Meeting friends at Terminal B TBIT during a layover. Do I need to re-enter Immigration?

I have a 4-hour layover in LAX. I'm arriving on a Domestic flight at Delta Terminal 3 and leaving four hours later on an International flight also at Delta Terminal 3.

I'd like to meet some friends at the airport for dinner. Looks like Tom Bradley has a few options that are outside the TSA controlled area. So I plan to walk from Terminal 3 to B TBIT, have dinner, then walk back to TBIT via the new Terminal 3 / TBIT connector.

My question is, when exiting the TSA controlled area at TBIT, I don't need to go through Immigration, right? My understanding is the TSA controlled departure area is not also immigration controlled, even at TBIT, because it's separate from the Arrivals area. Is that right?