Money: the farther removed from the jurisdiction the lawsuit was commenced in, the less likely that is to happen. In this case it's a toss up - although if you're going to ask a court to freeze the accounts you'd better have a good reason why (ie: the person is about to clear the accounts out and run or they have a history of moving the money around to evade courts/collections, etc). In this case mtgox would need the money liquid so they can carry on day-to-day business. It's probably not likely that the company will just pack up and disappear overnight (although that wouldn't be unprecedented) and forcing mtgox to collapse isn't going to help coinlab collect money from them if they are awarded any at trial. So in this case probably not super likely but definitely a possibility.

BTC/LTC/etc.: Not a chance. As long as a crypto-currency has no regulating body that can control it, who exactly would "freeze" the coins? This is one of the things that appeals to people are BTC/LTC. For example, the government can't come in and say "yeah we're broke so anyone with money in a bank account.. well 30% of that is now ours" (I think the situation in Europe was, at least partially, responsible for the rapid rise of the BTC recently... people want to put their money where only they have access to it).