Question about workspaces and filtering data based on field conditions and user roles

[ianaware]

I am not sure if this feature is currently implemented, I cannot find it or a way to implement it.

But what I want to do is this:

I make a custom multiselect field called 'Owner' with these values:

groupa
groupb
groupc
groupd

I then want to add a user role permission that is only able to access companies/opportunities that contain a specified owner (e.g. 'groupa').

The end goal being that users can only access data that contains that owner and that data from each group is essentially isolated so users can only see data according to the owner in the user role.

e.g. user1 has a user role that only allows them to see records where Owner is 'groupb'.
e.g. user3 uses this same user role except they can only see records where Owner is 'groupd' etc.

Is that possible?

Or is a better approach that each group would get its own Twenty CRM workspace?

Any help is much appreciated - thank you.