Special rights

I added a link in my navbar. The problem is, I want only certain members to see that link.
I tried Display --> Headers and Navigation, I added my new naviation button but i only have the option to make it visible for admins, moderators, members and guests.
Is there any way I can make it visible only for another group of members? I also dont want moderators to see it.
Thanks in advance for your answers!!

Hi,

If it's a custom button you made you can set the visability for this:

Yes, its a custom button, but i want a specific group to be able to see it.
Not the moderators, or the guests, or the other members.
Just 6 of the members.
I dont want to make them moderators, nor i want the moderators to be able to see the button. I dont know if i made myself clear.

You did make your self clear but I'm afraid there is no option as souch