XPP Compose Token tracking?

I thought there  was a file to track what processes had reserved/used a compose token...but either I'm blind, not searching the topic correctly.

We are trying to track back on what processes are actually using the compose license.  The purpose is to be able to kill tasks if we need to.

We run on Linux with automated flows that start multiple compose steps, they wait for a license until one is free.  The problem is Linux can't tell which compose command is actually holding a token.