That's the same as my setup, I don't know how you control the switches but I managed to get an Arduino to control them through the PC:
http://www.stavros.io/posts/control-rf-devices-with-arduino/
http://www.stavros.io/posts/control-rf-devices-with-arduino/
I have one of these: http://www.uk-automation.co.uk/products/RFXCOM-RFXtrx433.htm...
Plugged into the RPi that is running Domoticz.
Domoticz provides URLs that trigger scenes when hit.