If Seto is the guy I'd think Seattle is restricting talks in order to keep Seto focused on his current job. Which might mean we have to wait until after the Superbowl.
It's possible for NFL teams to deny assistants from interviewing for other positions, but not likely. The NFL has the rule that assistants can only interview during their bye weeks in the playoffs, including the 2 weeks off before the Super Bowl. So technically, CU could have already spoken with Seto a couple weeks ago during Seattle's bye, and/or can speak with him again after this weekend. Whether or not Seattle allows him to, is obviously something we won't know. I would be extremely surprised if MM and RG were told no by the Seahawks, and were just waiting on him. That'd be putting all their eggs in the Seto basket, without ever having talked to him, and I don't think they can afford to do that.
IMO, they have something in place