This request has been declined by the feature team.
Private channels may help with items such as this request once they are released. The Private channel topic is tracked at http://microsoftteams.uservoice.com/forums/555103/suggestions/16911079
Please note the handling of “Guest Accounts” is a separate ask and can be found at: https://microsoftteams.uservoice.com/forums/555103-public/suggestions/16911109-guest-access
The request about “Guest Access at the Channel” level is being tracked by this request: https://microsoftteams.uservoice.com/forums/555103-public/suggestions/31374577-guest-access-should-be-implemented-at-the-channel
Thank you all for the feedback.
If this would be available, would be really practical use of it.