HI Warren,
Great to see you on the forum again.
To answer your question: Yes the audit logs in prognosis capture this:
The files below: C:\Prognosis\Server\Configuration\audit\
I.e. The entry looks like this:
"2017-06-22 12:20:57","\AA-2K8-AAONLY","PQL Server","PQL Login","Success","dvrlab\administrator","AA-2K8-AAONLY.DVRLAB.local","","PQL Login on \AA-2K8-AAONLY by user: "dvrlab\administrator""
There is also a custom extractor solution available to make this data more accessible from Prognosis records and displays:
https://online.prognosis.com/forum/us-ask-the-experts/audit-log-extractor-track-prognosis-activity
The above is scheduled to be part of prognosis from 11.3 onward, but you can get a copy for earlier versions from that forum topic (Just reply to it asking for a copy).
Let me know if the above helps.