To be honest with you, I don't know what happens if it finds another copy. I only have it installed on my PC and I usually have the internet shut down when I'm working so there's nothing for it to access (I don't let it past my firewall and I always click "NO" when the firewall asks if I want to let it on). If I ever DID install it on hubby's machine, I would still deny it access to the network, just so I could do what you're talking about - render one image on MY computer while working on another on Hubby's computer. But I don't render in Poser, so I doubt I'll ever install it on any machine but this one. Kate