I recently purchased a used HP USB 2.0 Docking Station and to my suprise it works on PC's and Mac using DisplayLink drivers. They also seem to have drivers for Chrome OS, Android and Ubuntu. I also found this info on the driver downloa page:
"DisplayLink has not created drivers for other packages, however the Ubuntu driver contains an open source component which is designed to be modified to enable the Ubuntu driver to be repackaged for any other Linux distro by the user community."
So there is a strong change it can be used with raspberry pi. The dockin stations offer following ports: Audio in/out, ethernet, DVI, VGA, and 4 x USB 2.0
If I test it my self I will tell about the results...
The DS I am using is perfect for my purposes. I use multiple laptops with different OS's and I can now easily connect the to the same devices with USB