That is a good question.
There are two parts to the answer. On the Twitter platform, that's going to take you to the terms of service. That's a Twitter problem. The Government of Canada wouldn't really have much authority over that account. It's whether or not the Russian embassy is contravening Twitter's terms of service.
Where you can intervene, which is what I was talking about in my comments, is around the amplification. The Russian embassy sends a tweet that gets picked up by a bot network and a troll farm. All of a sudden it spreads all the way around the world. That's where you can be intervening along the lines I talked about in my comments.