title: Control internet connection
body: <p>I am trying to develop an application (C++/Qt preferably for multi-platform) that controls and filters the data stream entering and leaving the network (mainly internet), and restricts access to certain URLs in the browser.</p>
  
  <p>Is that possible with Qt? If not are there libraries that can do this? Or are there any APIs that I can use to control the connection on the computer?</p>