No you're an adult and even as a wife (or husband) no one should rule over your life like that. He is hands down, the epitome of controlling. It's his insecurity that leads him to feel that way. A controlling and abusive person has the goal in mind to isolate their subjects as much as possible. This includes moving farther away from friends and family, limiting one's phone usage or altogether keeping them from it in extreme cases and of course it follows that computer usage would be frowned upon. It stems from the fact that I believe the abuser knows what they are doing and the more of a "network" you have, the more chance that the abuser will be called on their actions and be held accountable for your pain and suffering.

You are absolutely in your right to continue using PC. In fact you SHOULD for the fact you can keep some kind of a support network going.