wpmem_ul_user_rows

add_filter( 'wpmem_ul_user_rows', 'my_ul_user_rows' );

function my_ul_user_rows( $rows ) {

    /*
     * This example adds a row to the user's profile in the 
     * main user list that links to a hypothetical contact 
     * page that needs the user's ID (which is a field 
     * available in the array).
     */
     
     $link = site_url() . 'contact/?contact_id=' . $rows['ID'];
     
     $name = $rows['first_name'];
     
     $rows['link'] = '<a href="' . $link . '">' . $name .  '</a>';

    return $rows;
}