Restrict UWL notifications from SAP ECC

Hi All,

I need to show request notifications  in UWL  from only one autor (for example WF-BATCH). Rest of the notifications should not be shown. I want to see only the Portal Notifications.

In the Portal Inbox i have two tabs: Tasks and Request Notificactions.

I know how to do this for the tasks, filtering in xml by one task (for example TS12345678) (external object id):

<ItemType name="uwl.someHiddenType2" connector="WebFlowConnector" defaultView="HiddenView">

   <ItemTypeCriteria systemId="SAP_R3_MUS" externalType="TS123456789" connector="WebFlowConnector"/>

</ItemType>

But the notifications can't be filtered by extenal object id because each notification has a diferent id (for example FOL29000000000089RAW1900000000842) . I mean two notifications of the same type have diferent external object id.

In backend i can see all the notifications in the Business Workplace inbox, this is right. But i don't want to show all of them in portal..

So, for this inbox tab (notificactions), how can i identify a group of equals notifications to restrict them?

Thanks! And sorry for my bad english