Hey @Arnaud_Desclaux! Welcome in!
So, here’s the example filter configuration for your example.
The Airtable filter layers can be a bit weird for people seeing it for the first time and for people that aren’t fully comfortable with control flow.
When you have to filter records in a more intricate setup, I find that it’s best to look away from Airtable and instead just say out loud exactly what it is that you want to do.
Now, in terms of solutioning for your interface, I think I need a bit more context in order to get a better sense of how you might best implement what you’re looking to build.