Is the laserwriter on a network connected with ethernet cables or phone net or something else? Directly connected to the computer? If the laserwriter has an ethernet connection then a direct ethernet to ethernet cable works or if you have cable modem or DSL you'd need a hub to get both machines on the network together.
If the printer talks Appletalk then the OS X machine should find it (with 10.1, the appletalk networking in 10.0.x sucked) with no problem. It's more a matter of physical connections than anything else.