The question is --- WHY on Earth would anyone want to hack the forum and get hold of **his** IP -- always assuming this was a static IP not a volatile one ?
I mean, I know that there can be some real eedjeets in an online gaming environment, and that some extremely immature ones are perfectly happy to try and screw around with anyone they may decide they don't like in some game-related nonsense or other -- and that the only way to protect yourself from some malicious online scum is to avoid going on to their websites --- but come on, a Guild forum ??!!
Does this mean that he distrusts his fellow guildies ???
It's hard to understand his motivations, without having any idea what he's actually scared of -- I mean if someone wants his IP then they are going to get hold of it one way or another, because it is not any kind whatsoever of secret information
If this guildy of yours is some kind of youngling, which is kinda how he sounds, then I think his fears are likely to be completely ungrounded as regards your forum, no matter what engine it uses -- simply because the chances of some malicious outsider even WANTING to hack various personal details out of your forum are very very low in my opinion.
I would assume for instance that your forum does not require that anyone enter their credit card details for example LOL