WildCard domains : how to treat IP Address and Specific Domains differently from Failover/Wildcard Domains ? (no replies)

forgive me if this has been asked before -- I couldn't find this exact question in my mailing list archives back to 2007

I am trying to deal with wildcard domains in a setup.

The intended result is to do this :

Requests for example.com
Serve Site A

All IP Address Requests :
Serve Site A

All other domains ( wildcard / failover )
Serve Site B

I've tried several combinations of listen + server name, but I can't get this right. I end up sending everything to site A or site B.
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