CUserTypeManager::AdminListPrepareFields

function AdminListPrepareFields($entity_id, &$arFields)
{
	$arUserFields = $this->GetUserFields($entity_id);
	foreach($arUserFields as $FIELD_NAME => $arUserField)
		if($arUserField["EDIT_IN_LIST"] != "Y")
			unset($arFields[$FIELD_NAME]);
}