Networking Multiple Consoles with Multiple Visualizers?

I'm looking to teach our in-house techs on the Hog console, utilizing a visualizer. If I get multiple consoles for the techs and want to have one visualizer per console, would I be able to run everything into a single network switch and just tweak IP addresses, or do I need a router for each console/visualizer pair set to 172.31.0.1?