Beware of firewalls if you intend to use sockets, maybe ok if just for your own use but could prove a support headache if it will be for general release .

Not used sockets before with PoserPython API but link to simple demo code for Poser as the client, minor changes are required but runniing server component from your OS command line and loading the client code into Poser should work and provide a starting point. Simple socket code