Hi, i have more issues here for permission of server groups.

I have "User" and competitive/recording Server Group:

At the first i want to the user can set himself the competitive/recording power, but i can't do that easily.

If i have in the "User" group:

Group modify power: 50
Needed group modify power: 60
Group member add power: 50
Needed Group member add power: 60
Group member remove power: 50
Needed group member remove power: 60

And in the "Competitive/Recording" Group:

Needed group modify power: 50
Needed Group member add power: 50
Needed group member remove power: 50

I want to user can add or remove himself the power of competitive, but he can't do it to the others "Users".

How i can resolve this problem?