No…not what your probably thinking.
Instead, synergy allows you to use a keyboard and a mouse to control several computers. What this lets you do on a network is use 3 or 4  computers, as a 3 or 4 monitor setup.
To make it better, a clipboard is shared across them.
You install the server software on the main computer that has the keyboard and mouse, and client software on the others. What is quite nice and lets everyone have the fun, is that you can use Macs in this wonderful array too.
Check it out, Synergy