The more I use asana with external clients and partners, the more I am in need of this feature.
User case: Working with a client on a series of tasks and activities within a project.
The project is owned by me and my team.
The client is given a comment only access and are engaging accordingly.
It is time to provide a status update to the internal stakeholders. I removed the notification for the guests, but I am aware they can still view it if they click around.
It would be really good to start having a bit more sophisticated permissioning for guests.
PS - I know I can create another project and utilise rules but that will create asana clutter which this suggestion could resolve 
Thoughts?