I thought I had the same need before realizing that, when using custom properties, I can assign more than one value to the entity I'm assigning it to.
For example, if I have the "Project" custom property, and every stream has a security rules that allows access to users who have a specific value of the "Project" property, the users can actually have more than one Project assigned to them.
My scenario is like below:
I have two sheets in my app that I'd like to be shown to only one user in a very easy way.
To achieve it I thought to create a tag linked to those sheets.
But unfortunately is not possible to create a security rule for "Tags" resource.
How can I achieve it in a smart way ?
Thanks in advance.