下面的代码是一个实现您所需功能的示例。看见tax_query 了解更多信息。

function my_get_posts( $query ) {
    // we only need to modify the query for logged in users
    if ( !is_user_logged_in() ) return $query;
    $current_user = wp_get_current_user();
    // assuming that user\'s region is stored as user_region meta key
    $user_region = get_user_meta( $current_user->ID, \'user_region\', true );
    $query->set( \'tax_query\', array(
        array(
            \'taxonomy\' => \'region\',
            \'field\' =>  \'slug\',
            \'terms\' => $user_region
        )
    ));
    return $query;
}
add_filter( \'pre_get_posts\', \'my_get_posts\' );