Can an Nvidia Tesla K80 Gpu be used to capture iPi Mocap and if not capture how about processing the capture data?
I know that there is no video in or out so I would just use onboard MB video or other methods to view monitor. Should 1, 2, or 3 of these cards be used to process
the captured mocap data?

We have never experimented with Tesla family and do not plan it. Their purpose is cloud computing in the first place not the desktop usage. But you are free to do that on your own if you've got such card at your disposal.
However, GPU computations implemented in Mocap Studio require that a primary GPU is used (among 1, 2 or 4 total GPUs). I guess one cannot make Tesla a primary GPU in Windows just because it doesn't have video outputs. Therefore, an integrated GPU should be involved in computations as well which effectively kills the performance of Tesla due to equal distribution of computations between GPUs.