Yes that is exactly what he is saying. It is very clearly stated in the rules that you are not allowed to sign your posts. Your name is literally 3 inches to the left, why would we need a reminder of who posted? These are forums not e-mail messages or formal letters.
The rules post put it very well IMO: No Signing Posts - Your username is already there, it's redundant. Plus it makes you look like a loser. (You might be a loser!) It's also an easy way to tell that you haven't read these rules.