How can do this modification?

[HaYLaZ]

ı try to tell winth the picture below.İn registering there two selections yes or no.And the user selects yes he can see adul forum but selects no he cant see the forum how can we do this modification:)

[HaYLaZ]

any idea?

[ReQueM]

up.

[MathewC]

Intesting idea, i'll be intrested

[Marco van Herwaarden]

There is a modification around that allow the user to be placed in a usergroup, based on a profile field.