Question: I want to deploy my project only for windows os not for Mac pc. The application is build up with flex. How can i deploy this only for window pc?

Answer: 
I don't think you can force the projector to compile into a a specific OS.

The best answer I can provide is to limit your app, by detecting the OS and causing a popup and disabling your app.

```
var operatingSystem:String = Capabilities.os;
trace(operatingSystem);

```

Etc.. "Windows XP", "Mac OS 10.x.x", "Linux"

That'd be set to only work on any OS you choose.
I don't think so you can force. 

> 
> When you deploy your application, you
>  make it available to customers.
>  Typically, you deploy the application
>  as a SWF file on a web server so that
>  users can access it by using an HTTP
>  request to the SWF file.
> 
> 
> 

You can restrict to certain users or domain through crossdomain.xml