Олег Голендухин (Все сообщения пользователя)

$dbr_attach = CMailAttachment::GetList(Array("NAME"=>"ASC", "ID"=>"ASC"), Array("MESSAGE_ID"=>$messageID)); 

foreach($arResult["TASKS"] as $key=>$task){
      $res = CTasks::GetList(
         Array("TITLE" => "ASC"), 
         Array("ID" => $task["ID"]),
         Array("ID", "UF_*")
      );
      while ($arTask = $res->GetNext())
      {
         $arResult["TASKS"][$task["ID"]]["MY_FIELD"] = $arTask["UF_MY_CATEGORY"]; 
         }
}

$arResult["FILTER"] = array(
   array("id"=>"NAME", "name"=>"User_123"), 

$GLOBALS["APPLICATION"]->IncludeComponent("bitrix:tasks.user.selector", ".default", Array("INPUT_NAME"=>"flt_field_user_grid_NAME"));