[slightly offtopic]

As I got interested in your software, your website says the following (about HKN1 I assume):
Does HotkeyNet work with multiple copies of a game on a single PC?

Yes. HotkeyNet doesn't care which PCs the games are on or how many copies are running, so it works just as well on a single PC as it does on a network with 10,000 PCs.
Did you actually test that? (e.g. with broadcasting movement keys where you send 10 keys per second).