Hopefully someone who knows French will be able to answer, but most of the people on this board speak English.
I do not speak French, but I guess that you want your collaborators to be able to see only their own records.
Any user who has direct access to the base can see all the data in the base. You cannot hide any data from these users.
Instead, you can build an interface that shows only the records for the current user. Then give those users access to only the interface.
