hmmm, after one week without an answer, I guess it’s not possible 🙁
In the meantime, I learnt a bit of wordpress programming, so I’ll probably try to cook my own specific solution, even if it’s a bit more involved on the programming side than what I planned to do…
I easily found how I can forbid users from seeing what they cannot see for the general part, now I have to find how I can give the specific accesses to specific users and how to create an interface to manage that part.
Still hoping for an answer though 🙂
Thanks,
—
Rémi