Migx : How to show user's context resourcelist only

MODX Revolution 2.2.10-pl
Migx 2.6.8

I use this line for my clients to be abble to choose a ressource :



Problem is that they can see every ressources of every contexts. I need them to only be abble to see the resourcelist of their context. Is there a way to do that ?

how do you define the context of a user?

The context of a user is defined with a user group context access.
I've tried to tick the checkbox of the user usergroup in the TV, but if do that the user is not abble to see th TV anymore.