If one of the mods / owners of bitcointalk got involved they could hand over his IP address, but maybe he's connecting from a VPN, TOR or other external service, so might not be reliable.
Technically they can do it, but they won't to it. Scam aussations isn't moderated here and staff don't get involved into it. But getting their IP address most likely wouldn't help and wouldn't prove anything. I'm sure that Freebitco.in is hiding their traces and it won't be that easy to find them.