Yes you should. But check to be sure, if you can LPR a job, you are on his LAN, just put the IP you are printing to in the address bar of whatever web browser you use on the PC submitting the job. That will verify if it is a Fiery/Freeflow or internal controller.
Fiery and Freeflow are computers that are usually added to this device to get faster prints and better job management. They handle the jobs very differently.
And you can simply Telnet to the IP in question via telnet 192.168.1.1 515 (replace the IP with his) and that will tell you if there is a block on LPD for sure.