I'm not a lawyer, but I think I've got at least a basic idea of the circumstances under which the government can take someone's property. This doesn't seem to coincide with any of those potential circumstances, especially when the seizure transfers the property to another non-governmental entity.
What's more, where's the due process? No-IP seems to be saying that they didn't even know about the court case until being served with the order. Did they really not have the opportunity to contest this?
EDIT: To summarize some of the documents people have linked to and analyzed below, it looks like Microsoft was granted a temporary restraining order under "Federal Rule of Civil Procedure 65(b)", which allows for such orders to be granted without providing notice as long as certain requirements are met.
Microsoft was required to post a $200,000.00 bond, which is supposed to pay for any damages incurred by No-IP, and No-IP will be granted the ability to contest the order in court on July 10, and maybe earlier. However, it is clear that No-IP knew nothing about even the lawsuit until they lost control of their domains, as this was specifically ordered by the court.
Also, there is no answer as to whether transferring control over domain names from a defendant to a plaintiff is something that courts should be empowered to do as part of a temporary restraining order. I hope a lawyer with some knowledge in this area can chime in to answer that question.