Now once can save the workflow e.g. as "CreateCollection" and assign it as a Send to workflow to MediaPortal via ConfigPortal.
Create a collection in MediaPortal and start the Workflow on that collection.

The workflow will be triggered and the "Add Item to Collection Task" will be run three times in this example for the three assets in the collection, iterating through the three item Ids.
Once completed, the result is a Vidispine collection that contains the three items.