Nieuw XsBB Forum

The title says most of it. I have a user on my phpBB who is doing a bit of trolling. I believe he has multiple accounts as it is a low traffic place and the writing style seems very similar.

I'm still new to phpBB.

Can I figure out if all of the accounts belong to the same person?

Can I see the IP addresses of the various accounts to compare them?

What if s/he is posting from a VPN account?

Thanks for any tips.