I also want the option like No3 to hide certain folders/tasks in a shared parent folder. So employees could see all aspects of a job except the costs for instance.
Another vote for getting this on the "roadmap" ASAP, working in the print industry we are more and more having to be time specific with deliveries/collections and this is really a must have feature...
That would be a great addition, not that I make many mistakes mind ;-)
I'm a definite yes, I need this option as it seems more logical to me, most up to date comment at the top.