你需要使用动作钩pre_get_posts.

有关详细信息，请参见注释，并将自定义帖子类型修改为您自己的类型：

add_action( \'pre_get_posts\', \'filter_cpt_listing_by_author_wpse_89233\' );

function filter_cpt_listing_by_author_wpse_89233( $wp_query_obj ) 
{
    // Front end, do nothing
    if( !is_admin() )
        return;

    global $current_user, $pagenow;
    wp_get_current_user();

    // http://php.net/manual/en/function.is-a.php
    if( !is_a( $current_user, \'WP_User\') )
        return;

    // Not the correct screen, bail out
    if( \'edit.php\' != $pagenow )
        return;

    // Not the correct post type, bail out
    if( \'portfolio\' != $wp_query_obj->query[\'post_type\'] )
        return;
        
    // If the user is not administrator, filter the post listing
    if( !current_user_can( \'delete_plugins\' ) )
        $wp_query_obj->set(\'author\', $current_user->ID );
}