Q: if they can, how? even if it says it doesn't have network support?
A: When a printer has network support, it means the printer can be connected directly to a network and be accessible to all computers on the network. Otherwise, you can connect the printer directly to one of the machines, then share the printer with the other computers. It's not as elegant, but for a situation where there arent that many users or not a lot of printing going on, it works. Of course it means that the computer to which the printer is connected must be on and logged into the network for the others to use it.