I think they simply have the monitoring software for Windows and not for Linux because it has not been bought/developed/whatever.
Linux is not the point, it would be the same if he were using hardware that prevents the monitoring (such as a firewall). While I sympathize with what the fellow is running through, I find it a bit out of place that he complains about not being allowed to use Linux when he could be sitting in a cell. Basically the deal is "It's ok you use a computer in a way we can watch the pr0n you l33ch". -- Die Gestalt