I don't know if anyone have asked this question already, but I couldn't find related answer.
So as my organization is going to implement Teams, I'm trying to see if under one big group, different channels can have different user permission?
For example, in group A I have A, B, C, D, E, F, G members. Under Group A, I have 3 channels. Channel 1 I want only A, B, D has access. Channel 2 I want everyone has access,. And Channel 3 I want only A, B, C, E has access.
Yeah, as for today, this is not possible! You might change the file permissions in sharepoint for each folder(channel) but is not recommended! Although other workloads like channel messages, planner, onenote etc isn’t affected by this!
As said, private channels are to be released this year, but exactly how it works I do not know, but most likely it may cover some of your scenario!!
For now you have to utilize different Teams to set different permissions instead of channels! If you are good with explicit permissions on files, I recommend creating different libraries with different permissions and add them as a SP library tab in Teams! Also avoiding messing with the Teams default permissions!