1. Because WFilter works in pass-by monitor mode, it can only kill TCP connections.
2. WFilter use signature matching to identify protocols. Since protocols might be very complex and changing, we do not guarantee the protocol identify of WFilter as 100% correct.
3. Some softwares will auto reconnect once the connection broke, so that breaking a connection will not forbid the software surely. To forbid softwares and the usage of arguments, please refer to "How to block Internet usage?".