Thanks much for the reply cappalli. Unfortunately not to the extent that I am looking for. The genesis of looking into this is that we had someone give users more controlls in the user portal than they should have had, at an unknown point in time.
Since then, there have been multiple config changes in Guest Manager, yet not all of those config change instances are showing up in the Audit log (CPPM > Monitoring > Audit Viewer) and what is there just says that a change was made to Guest Manager, not what changed. We are really looking to get a lot more granualrity. The Manual for 6.6 CPPM is frustratingly light on logging configuration.