No. That's just one reason why a person can have their second amendment rights taken away. There are a bunch of others. BTW, what you said isn't quite enough. The qualification is being adjudicated mentally defective AND a threat to yourself or others. You can be nuts and own a firearm as long as you're not dangerous.
Violation of 18 USC section 922(g). Even if/when the restraining order is removed, he's now a felon and has lost his RKBA forever. And so would you,even if you'd had a single round of .22 LR in the bottom of your sock drawer, were you at the same time subject to a "domestic violence" restraining order.
The only power any government has is the power to crack down on criminals. Well, when there aren't enough criminals, one makes them. One declares so many things to be a crime that it becomes impossible for men to live without breaking laws.
Ayn Rand