These people are being detained by people with POLICE written on their vests, charged in front of a magistrate, and released. All the info is on the Portland website of arrests.
https://oregon.staterecords.org/multnomah
What civil liberty has been suspended?
Those are the violations of civil liberties we are discussing and this argument throws out.
You can even see who the arrest agency is and it includes federal agencies. Note that most of them have been released.
But up thread you claim that the people detained and placed in unmarked vehicles are listed there. I was wondering how you had determined that, or if you were assuming it to be true, or what.
It just demonstrates that some people detained in Portland have been detained by officers working under those entities.