Access to particulate private categories only

I am trying to figure out how to give certain members access to only a single private category. We find that within our organisation, members for whom only this private category is relevant get inundated with too much information when they also have access to the non-private categories on our forum, which are not relevant to them.

I know a solution would be to make all categories private, but I prefer to keep my mix of private and non-private categories, if at all possible...

Apologies if this question has already been anwered elsewhere, I searched but could not find the answer I needed. Thank you!

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