Basically hides a user account unless you're the user account. Used on a project where I had to allow other Admin users, but I didn't want them messing with my account.
/*
Hide the Fotan user account on the Dashboard Users screen from everyone but me.
*/
add_action('pre_user_query','yoursite_pre_user_query');
function yoursite_pre_user_query($user_search) {
global $current_user;
$username = $current_user->user_login;
if ($username != 'fotan') {
global $wpdb;
$user_search->query_where = str_replace('WHERE 1=1',
"WHERE 1=1 AND {$wpdb->users}.user_login != 'fotan'",$user_search->query_where);
}
}