“ADs set  up in different servers”

I don’t know what this means.

I consider audiences  to be an immature feature in SPS 2003. Once
established they can only be used to do one of two things.

1. Web Parts can be shown or hidden in their entirety given a person's
audience membership.

2. The Grouped Listings Web Part can group Listings by audience. It
cannot group by some other attribute and only show Listings for a given
audience.

Audiences only work on SPS Areas.