Sorry, a bad habit slipped in there when I replied. On a rather large instance I’m a moderator on I get yelled at for posting responses that are too detailed, so I tend to answer the question without going into too much detail. I forgot that here it’s actually okay to get into the details. 
Thank you for posting that link, I knew I’d seen an DE query on here that could look it up with a topic and post id before but couldn’t find it when searching.
I don’t usually need to do that kind of lookup so I usually use a query that just dumps the 20 most recent anonymous mode accounts and their associated users.