You may add a specific printer in Mac OS X using the LPD protocol.
Add a new Printer, in the IP tab choose Line Printer Deamon - LPD. Enter printer.phys.ethz.ch as printer address and the name of the printer as queuename. The list of available queues can be found on printer.phys.ethz.ch. Specify a name for the printer, and its location. Finally you need to choose the right driver for your printer. In many cases Generic PostScript Printer should work.
On Lion 10.7 or older you may also follow Printing with CUPS (Mac OS X), as this shows you the list of all available printers, and automatically configures the correct driver for each printer.