bbPress Support?

I believe bbPress is an entirely separate application, so the CloudFlare WordPress plugin would not work here.

A better solution for you in this case would be to install mod_cloudflare into Apache instead so all of your web apps running get the original IP restored:

https://support.cloudflare.com/hc/en-us/sections/200038166-How-do-I-restore-original-visitor-IP-to-my-server-logs-

That’s what I was thinking. Thanks Simon.