i suppose
its possible, but you would have to purchase 3 ubs a to a cables (which run about $60 each) so it would be cheaper (and your lan would be much faster) to run with nics and a hub, you would need
hub/switch/router~$30 usd
3 network cables ~$30 usd
3 network cards ~ $20 usd
or for usb
usb hub ~$25
3 usb a to a cables ~$210 usd
lol u do the math