The statutes supplied talk about “trafficking in counterfeits” and “attempted transactions”, nowhere do they have authority to act pre-emptively. They can seize anything used in the transaction or attempted transaction but only after a trial.
Actually, it appears that it’s part of the TOS for godaddy.com and networksolutions that they will comply with a federal agency in countering the theft of intellectual property. Whereas Wikileaks.org isn’t registered with either registrar.