Show userid in post

I've looked around and haven't had any look finding an answer to this particular question, so I'm hoping someone here might be able to tell me if this is possible with punbb forums.

I'd like to make a post, and somehow embed a variable in that post so that for each user it showed up different. Specifically I'd like it to show that current user's userid.

For example, if I was reading it and my user id was 1234, it would look something like "hi this is a post and you are 1234"

Any help would be appreciated