VoIP Calls Flow - distinguish UAs by IP:port instead of IP

This feature is very handy to display in a clear way a complex call flow. But unfortunately it is almost unusable in case User-Agents share the same IP address and talk together. Resulting graph is flat with only one speaker talking to itself and no information attached to messages, only ports and arrow.

That's why I'm wondering : is there any way to distinguish speakers (i.e. UAs) by something more than only IP address, ideally IP address + port ? That would be great!

TIA