Internet User Role for BP

I'm implementing CRM for a client that has a non-SAP customer self service application.  If we were implementing UCES (or MCF), I would use the role BUP005 to link that BP to the internet user name that they will use to do self-service.  There is a role BUP006 that does not require a SAP user, but in configuring the transaction for that role, I cannot see how to even track the user name for that BP.  Does that capability exist with BUP006?