gistfile1.txt

\Bitrix\Main\EventManager::getInstance()->addEventHandler('sale', 'OnSaleAdminOrderList', 'OnSaleAdminOrderListHandler');
function OnSaleAdminOrderListHandler(\Bitrix\Main\Event $event)
{
    $getListParams = $event->getParameters();

    if ($_REQUEST['by'] == 'USER_STATUS') {
        $getListParams['order']['USER_GROUP.GROUP_ID'] = $_REQUEST['order'];
        $getListParams['runtime']['USER_GROUP'] = array(
            'data_type' => 'Bitrix\Main\UserGroupTable',
            'reference' => array(
                '=this.USER_ID' => 'ref.USER_ID'
            ),
            'join_type' => 'inner'
        );
    }

    $result = new \Bitrix\Main\EventResult(\Bitrix\Main\EventResult::SUCCESS, $getListParams);
    return $result;
}

\Bitrix\Main\EventManager::getInstance()->addEventHandler('main', 'OnAdminListDisplay', 'OnAdminListDisplayHandler');
function OnAdminListDisplayHandler(&$list)
{
    if ($list->table_id == 'tbl_sale_order') {
        $list->aVisibleHeaders['USER_STATUS'] = array(
            'id' => 'USER_STATUS',
            'content' => 'Статус клиента',
            'sort' => 'USER_STATUS',
            'default' => true,
            'align' => 'left',
        );
        $list->arVisibleColumns[] = 'USER_STATUS';

        define('OLD_GROUP_ID', 21);
        define('NEW_GROUP_ID', 22);

        foreach ($list->aRows as &$row) {
            $arGroups = \Bitrix\Main\UserTable::getUserGroupIds($row->arRes['USER_ID']);
            if (in_array(NEW_GROUP_ID, $arGroups)) {
                $row->addField('USER_STATUS', 'Новый');
            } elseif (in_array(OLD_GROUP_ID, $arGroups)) {
                $row->addField('USER_STATUS', 'Старый');
            }
        }
    }
}