It isn't. You can only work with one Poser at the same time!!! In fact, you can't use 2 poser versions with the same serial on a network at once!!! Copy from EULA of Curious Labs: Can I install Poser on more than one computer at a time? Yes. Your Poser 5 End User License Agreement (EULA) specifically allows you to install your copy of Poser 5 on more than one computer provided you never run that copy on more than one computer at a time. For example if you have a desktop and a laptop computer, you may install Poser 5 on both computers but cannot run the application on both computers simultaneously. You will need to register on both systems as they will create unique Challenge and Response codes for each system. Can I run the same copy of Poser 5 on more than one computer at a time? No. Running your copy of Poser 5 on multiple machines is a violation of the Poser 5 license agreement. Poser automatically checks your local network (if any) for other running versions using the same serial number. So, I don't violate the EULA, since I only run Poser on one System, the others just needs Poser to be installed, so my networkrendering works. In case you don't agree with me, tell me why Poser is telling me that I can't run it twice on different systems on my network, but doesn't tell me anything at all while it acess it with the networkrendering? greetz, Steven.