The next major release of LimeWire will have the ability to block addresses like 192.*.*.* or 192.168.0.0/255.0.0.0. In addition, there is a "whitelist" feature to selectively enable addresses like 192.168.1.2. This is nice for creating private networks, among other things.

The code has been on the limewire.org CVS trunk for some time now if you'd like to try it out. Be aware, however, that the CVS trunk is quite buggy at the moment because of other code changes; you'll definitely be on the bleeding edge.

Thanks again to Gregorio Roper for submitting the filter patch.

-Chris