diff --git a/includes/core/class-member-directory-meta.php b/includes/core/class-member-directory-meta.php
index 4f321cf6..7b187931 100644
--- a/includes/core/class-member-directory-meta.php
+++ b/includes/core/class-member-directory-meta.php
@@ -328,7 +328,27 @@ if ( ! class_exists( 'um\core\Member_Directory_Meta' ) ) {
 									// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- $join_alias is pre-escaped.
 								}
 
-								$values = implode( ' OR ', $values_array );
+								/**
+								 * Filters change select filter relation.
+								 *
+								 * @param {string} $relation.
+								 * @param {string} $field field key.
+								 *
+								 * @return {string} relation.
+								 *
+								 * @since 2.8.5
+								 * @hook um_members_directory_filter_select_meta
+								 *
+								 * @example <caption>Change relation to 'AND'.</caption>
+								 * function my_um_members_directory_filter_select_meta( $relation, $field ) {
+								 *     // your code here
+								 *     $relation = 'AND';
+								 *     return $relation;
+								 * }
+								 * add_filter( 'um_members_directory_filter_select_meta', 'my_um_members_directory_filter_select_meta', 10, 2 );
+								 */
+								$relation = apply_filters( 'um_members_directory_filter_select_meta', 'OR', $field );
+								$values   = implode( ' ' . esc_sql( $relation ) . ' ', $values_array );
 
 								// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- $join_alias and $values variables are pre-escaped or $wpdb->prepare.
 								$this->where_clauses[] = $wpdb->prepare( "( {$join_alias}.um_key = %s AND ( {$values} ) )", $field );
diff --git a/includes/core/class-member-directory.php b/includes/core/class-member-directory.php
index 34f87665..a6acb377 100644
--- a/includes/core/class-member-directory.php
+++ b/includes/core/class-member-directory.php
@@ -1872,35 +1872,54 @@ if ( ! class_exists( 'um\core\Member_Directory' ) ) {
 
 								case 'select':
 									if ( is_array( $value ) ) {
-										$field_query = array( 'relation' => 'OR' );
+										/**
+										 * Filters change select filter relation.
+										 *
+										 * @param {array}  $args query args.
+										 * @param {string} $field field key.
+										 *
+										 * @return {array} query args.
+										 *
+										 * @since 2.8.5
+										 * @hook um_members_directory_filter_select
+										 *
+										 * @example <caption>Change relation to 'AND'.</caption>
+										 * function my_um_members_directory_filter_select( $args, $field ) {
+										 *     // your code here
+										 *     $args = array( 'relation' => 'AND' )
+										 *     return $args;
+										 * }
+										 * add_filter( 'um_members_directory_filter_select', 'my_um_members_directory_filter_select', 10, 2 );
+										 */
+										$field_query = apply_filters( 'um_members_directory_filter_select', array( 'relation' => 'OR' ), $field );
 
 										foreach ( $value as $single_val ) {
 											$single_val = trim( stripslashes( $single_val ) );
 
 											$arr_meta_query = array(
 												array(
-													'key'       => $field,
-													'value'     => $single_val,
-													'compare'   => '=',
+													'key'     => $field,
+													'value'   => $single_val,
+													'compare' => '=',
 												),
 												array(
-													'key'       => $field,
-													'value'     => serialize( (string) $single_val ),
-													'compare'   => 'LIKE',
+													'key'     => $field,
+													'value'   => serialize( (string) $single_val ),
+													'compare' => 'LIKE',
 												),
 												array(
-													'key'       => $field,
-													'value'     => '"' . $single_val . '"',
-													'compare'   => 'LIKE',
-												)
+													'key'     => $field,
+													'value'   => '"' . $single_val . '"',
+													'compare' => 'LIKE',
+												),
 											);
 
 											if ( is_numeric( $single_val ) ) {
 
 												$arr_meta_query[] = array(
-													'key'       => $field,
-													'value'     => serialize( (int) $single_val ),
-													'compare'   => 'LIKE',
+													'key'     => $field,
+													'value'   => serialize( absint( $single_val ) ),
+													'compare' => 'LIKE',
 												);
 
 											}
@@ -2168,35 +2187,36 @@ if ( ! class_exists( 'um\core\Member_Directory' ) ) {
 										$value = array( $value );
 									}
 
-									$field_query = array( 'relation' => 'OR' );
+									/** This filter is documented in includes/core/class-member-directory.php */
+									$field_query = apply_filters( 'um_members_directory_filter_select', array( 'relation' => 'OR' ), $field );
 
 									foreach ( $value as $single_val ) {
 										$single_val = trim( $single_val );
 
 										$arr_meta_query = array(
 											array(
-												'key'       => $field,
-												'value'     => $single_val,
-												'compare'   => '=',
+												'key'     => $field,
+												'value'   => $single_val,
+												'compare' => '=',
 											),
 											array(
-												'key'       => $field,
-												'value'     => serialize( (string) $single_val ),
-												'compare'   => 'LIKE',
+												'key'     => $field,
+												'value'   => serialize( (string) $single_val ),
+												'compare' => 'LIKE',
 											),
 											array(
-												'key'       => $field,
-												'value'     => '"' . $single_val . '"',
-												'compare'   => 'LIKE',
-											)
+												'key'     => $field,
+												'value'   => '"' . $single_val . '"',
+												'compare' => 'LIKE',
+											),
 										);
 
 										if ( is_numeric( $single_val ) ) {
 
 											$arr_meta_query[] = array(
-												'key'       => $field,
-												'value'     => serialize( (int) $single_val ),
-												'compare'   => 'LIKE',
+												'key'     => $field,
+												'value'   => serialize( absint( $single_val ) ),
+												'compare' => 'LIKE',
 											);
 
 										}