QUOTE(GlassBeadGame @ Sat 5th December 2009, 4:15pm)
Still it is a good start. Remember the wiki software gives exact times of edits which can be compared against schedules to weed out most employees very quickly. Might be a client, I suppose. Confidentiality might make problems then.
Foundation66 has had that IP for a while now; at least three different domains that they own have pointed to it:
8.3.22.212.in-addr.arpa domain name pointer mailserver.foundation66.org.uk.
8.3.22.212.in-addr.arpa domain name pointer mailserver.rharp.org.uk.
8.3.22.212.in-addr.arpa domain name pointer dickens.arp-uk.org.
I don't think confidentiality plays much of a role here, because it's most likely an employee. Most companies have policies about improper use of computers by employees. The company might feel that revealing the name of the perp (if they know who it is) will get the company off the hook. Otherwise the question becomes, "Is the company liable for employees who use company resources in a manner that is actionable, and also against company policy?"
If the company was in the U.S., and especially if it was in Florida, the plaintiff could get a judge to order the company to check it's computers for evidence. That happened in the Fuzzy Zoeller case. But this cross-jurisdictional stuff is so messy.