To what purpose?  Everyone on your WiFi network can install the Sonos app and control your Sonos system.  You can install multiple streaming services, including multiiple accounts for the same streaming service.  If you want to set it up so a different person in you family can only use different streaming services than you or other family members, that is not possible.

Thank you, I thought it was possible to put someone from his family while keeping the security privileges on his Sonos account. But if I seem to understand it is not possible. Thank you for your speed. Kind regards

Christian

Thank you all,

I close the subject