We have a setup where we have all our active customers in one Space and then in separate folders. We are a small company and as of right now all staff members in our company have access to all folders (access granted in the Space root folder).
Then we have a folder for each customer, which contain two folders - one which is shared to the individual collaborators from that company and one which is for our internal use only.
The setup in itself work fairly good, there are things to improve but overall it works ok. The main issue with this setup (and I guess all other setups also - spanning spaces even) is that I or anyone else in the team can easily misclick and assign a task to another user from another company.
Could you please add an option to - on a folder level - select something like "Tasks in this and sub-folders cannot be assigned to anyone other than the ones in the list below".