LimeWire, as a company, has absolutely no control over what is shared on the public network, which is
not a "LimeWire" network but the gnutella network that many different gnutella-compatible programs connect to.
Copy down the IP address and report it to the police or whatever tips organization you have in your area.

That 70 - 80% statistic sounds pretty suspicious. If a credible study had proved it there would
have been a lot of press coverage and everybody would know it, so treat that statistic as just
another example of somebody trying too hard to sell their ideas on anti porn activism.