um, I think he is asking:
How do I stream my webcam images over my network (wifi in my instance) to another computer. I am using Expression Encoder 4 library for the video composition.
Knowing this is not enough. What OS, webcam make, technology (WPF, Winforms) etc.
My first point of call would be this article.
How to use a web cam in C# with .NET Framework 4.0 and Microsoft Expression Encoder 4[
^]
You will need to create a client application that listens on a TCP port for the data stream. Once you receive a response from laptop1 you will be able to display on laptop 2 using the approach in the article.