Running Boundary as a shared service really comes down to the configuration of the platform you’re running it on. For example, in AWS, you can peer VPC’s between many accounts to accomplish a single deployment of Boundary which can be shared across many accounts. As long as there is a route from the Boundary client to the worker, and from the worker to the target, things will work.
Let me know if this answers the question, and thanks again for trying out Boundary.