Thanks Joe, but the documentation you are refering to might be outdated (8/2010). The firmware which is installed here shows Version 1.0.1 ( or 0.101) from 11/2015.
On the panel, there is an option to change to a networked printer. The very little panel-help shows an example syntax of "http://server/.printer" or "\ID:Pwd@IPPrinter" - but I struggle with those limited examples...
As it is implemented in the Firmware, I do have strong hopes, someone is already using that feature?