My name is Luis and I work for the Metabase Success Engineering team

The problem that you're trying to solve here is to make internal users (in this specific case) to see their data and not be able to change the filters. Metabase has a feature called "Data Sandboxes" (https://www.metabase.com/docs/latest/permissions/data-sandboxes) that allows administrators to use user properties to be injected into the query that arrives to the data warehouse, without the user being able to modify the query at all (the rewriting happens on the backend).

We put a lot of effort and people's time in the documentation of the product, so please use that before looking for answers somewhere else. Most probably every single need is either addressed or we have an issue created in our public github issue tracker.