http://www.ogre3d.org/forums/viewtopic.php?f=1&t=75903
Chromium is a flexible framework for scalable real-time rendering on clusters of workstations, derived from the Stanford WireGL project code base.
http://sourceforge.net/projects/chromium/
Chromium is ok but Equalizer is better.
Equalizer is the standard middleware to create and deploy parallel OpenGL-based applications. It enables applications to benefit from multiple graphics cards, processors and computers to scale the rendering performance, visual quality and display size. An Equalizer application runs unmodified on any visualization system, from a simple workstation to large scale graphics clusters, multi-GPU workstations and Virtual Reality installations.
It allready comes with a networking library to do exactly what your talking about.
http://www.equalizergraphics.com/
https://github.com/Eyescale/Equalizer
Example Code for Equalizer and Ogre
http://software.1713.n2.nabble.com/EqOgre-td7581862.html
Wish I had a setup tht looked something like this 
