Enable Content Delivery Api to NOT deliver content

We need to omit content from beling delivered by the content delivery api, but it does not seem to be possible. For example some articles are not allowed to be shown to users from specific countries for legal reasons. So we want to ensure from the backend that the frontend will not render them.

The idea was to create a ContentFilter or ContentApiModelFilter that checks if the content is an article not allowed in the current country. If so, it should be omitted(not delivered) by the content delivery api. But obviously that is not supported since you cannot remove all properties. See my related post in your forum:
https://world.optimizely.com/forum/developer-forum/cms-12/thread-container/2023/12/how-to-removeomit-content-in-contentfilter-or-contentapimodelfilter/

This is something we would expect to be supported since it's an important requirement to be able to not delivery something under a certain condition.