can I use Virtual Here on two (or more?) devices... one at a time?

Hi.
I've been using (a licensed) Virtual Here to send a 3D mouse from macOS to my work Windows machine for the last few years.  All is good with that.
Last week i attached a Windows box along side the macOS box, and switch between them with the Keyboard/Mouse switch (really USB port switch) built in to a Dell monitor.
I'm trying to figure out what I need to do to make the client machine (Windows at work) see the 3D controller.

Do I have to stop the server on the macOS, then start it on the Home Windows machine, and vice versa?
Or is this where a Cloudhub comes into play?  I do have a Pi3B available.

Or perhaps i need to explore the Modular KVM/IP, though that seems like it's a Pro level solution (I haven't read through it all yet).
Many thanks!