Is it possible to filter on a one-way send port?

I have and orchestration that uses a role link to determine which send port to send documents to.  I need to grab a copy of the document outputted to any of the one-way send ports used in the role link.  I thought I could filter using BTS.SPName but that appears to only be for 2-way ports.  Is there another way to grab the xml going to one of these one way send ports? 

Thank you.