Two people using the same IP isn't proof of anything, some IP's have dozens of members using them. For example, the IP address being used by the person (mconnor) who started the Jagger thread was being used by 23 people. Interestingly, 'mconnor' was a brand new account and only set up the day before he started the thread. There's no way that person could have known the IP's matched unless they were told so by a mod, or maybe 'mconnor' was actually a mod (there is a mod on the list of matching IPs).
For the record, moderators like me and DJ only have access to our own board and we don't have access to email addresses. I don't know why other mods are convinced that CC is Mr Jagger because the only thing linking them (as far as the information we have), is the IP address.
Maybe others know more than I do but I need more than that to convince me it's the same person.