Interprocess communication is not permitted in Win8 and Windows Store Apps. This is a limitation in the .Net framework set by Microsoft and is explained in detail in
this article. This prevents using TCP Socket over localhost.
That also means that the current client-server design of the EyeTribe Dev Kit is not permitted in Win8 and Windows Store Apps. You will be able to find a workaround if running over network.
Before releasing commercial applications, please make sure you read the license agreement in the dev kit.