I don't think that's true. If we are talking about SOPA here, it wouldn't matter where the servers were. They were using a US based TLD MegaUpload.com and therefore their domain could be "erased". If they didn't have a domain address, then they could look at where the servers were.
Meaning: If they were MegaUpload.ch, they would have needed to SOPA to take the domain down. But they still would not have been able to seize the servers and arrest the operators.
tl;dr: Relating this to SOPA is a bit of a stretch.
Meaning: If they were MegaUpload.ch, they would have needed to SOPA to take the domain down. But they still would not have been able to seize the servers and arrest the operators.
tl;dr: Relating this to SOPA is a bit of a stretch.