Restrict access and track usage of color printer

I need a way to restrict and track the printer being done to a color laser printer. Budget is extremely limited, so the printers are low end color laser network printers with no tools on board to do this job.

I have several “shared” PCs on the network, so the control can’t be done by individual PC or by the user logged at the time.

A further complication is that the LAN is in essence peer-to-peer, without a domain controller.

I know of copiers that require a code on the printing dialog box in order to print, but that requires dedicated hardware.

Any ideas?