Hi hpooni, welcome to the forum.
Yes, something like what you describe should be possible. However, when you say "server" do you mean Windows Server, or just a central machine running Windows?
As far as we know, VoxCommando does not run on Windows Server. It requires Vista, W7 or W8.
Also, if you use multiple Amulet remotes, each one will have its own wireless USB dongle and each will show up as a separate input in Windows. VoxCommando can only listen to one input at a time. So you would probably either need to run multiple instances of VoxCommando simultaneously (each listening to a different input) or you will need to combine your inputs using something like VAC (
http://software.muzychenko.net/eng/vac.htm).
It is not usually a problem to run as many instances of VoxCommando as you like. Users often do this, for example, to be able to issue commands in different languages.
If you go the VAC route, you will have problems if multiple users try to issue voice commands at the same time from different remotes.
Finally, I don't actually know how many Amulet remotes you can install on the same system before they start to interfere with each other's RF signals, since I only have one and this has therefore never been tested. I recommend that you PM Eddy from Amulet Remotes ("eddyc" here on the forum) about this.