Technically, the workaround of switching project Track Mode back and forth between None and Clarity seems to work.
Functionally, this will make daily team reviews awkward at best.
Running two separate projects where the two sets of resources are working on the same tasks? That won't fly - that really twists reality to fit the tool, way too much.
The whole idea of having to use workarounds is crazy. Projects, in reality, regularly have labor and non-labor resources, and often times labor resources that may not have access to a company's CA PPM instance. And, half of the problem works already - when actuals are booked for Track Mode = None resources in MSP, the ETC in CA PPM is properly updated.
Why stop at half a solution?
Guess I'll be searching for existing Ideas on this, creating a new one if necessary.
Dale