Таблица пользователей в связке с инфоблоком

 \Bitrix\Main\Loader::IncludeModule('iblock');         
         $result = \Bitrix\Main\UserTable::getList(array(
            'select' => array(
               'ID','NAME', 'SECOND_NAME', 'LAST_NAME',
               'PERSONAL_COUNTRY', 'PERSONAL_STATE', 'PERSONAL_CITY', 'PERSONAL_STREET', 'PERSONAL_PHOTO',
               'UF_COMPANY_ID', 'UF_SUBCOMPANY_ID', 'KO.NAME', 'KP.NAME'
               
               
               ),
            'filter' => array('ID'=>$user_id),
            'limit' => 1,
            'runtime'=>array(
               'KO' => array(
                  'data_type' => '\Bitrix\Iblock\ElementTable',
                  'reference' => array('=this.UF_COMPANY_ID' => 'ref.ID'),
                  'join_type' => 'LEFT'
               ),
               'KP' => array(
                  'data_type' => '\Bitrix\Iblock\ElementTable',
                  'reference' => array('=this.UF_SUBCOMPANY_ID' => 'ref.ID'),
                  'join_type' => 'LEFT'
               )
            )