How i can make this? Only this member in group can read forum (in mean: not topic)?

Know everyone a solution, how I can to adjust this:

My forum has already installed this app (Advanced Tags & Prefixes 3.1.8) and I am very happy with this app, but only one thing is missing what I miss this. This prefix feature so that these forums with prefix do not appear for members in specific groups (not visible).

In mean for example:a member XY is in a group (car) and a member XX is in a group (truck). A member XY has opened a forums and prefix required field (cars). And a member XX (in group truck) can not see, read or access forums of member A (in group car). I mean, forums are invisible to members who are in group (trucks).

PS: Not topic mean, so: fora or forum!
Thank you so much for helping.