@Tomishand I recently needed to have the ability to remove selective access for certain users from a selection module and a model-to-users import.
The documentation on Anapedia is not very clear on the subject so I thought I’d detail the steps here.
We import the code of the items to add in the Read / Write though importing only adds the items to the user access.
Importing codes in the None field will remove the corresponding items from the user access.
In the example below, importing a line item containing one country in the Geo L1 None will remove the corresponding country, and only this one.

It would be great to see Anapedia updated to make this a bit clearer!