To further clarify my issue...
A http request using DOMAIN1:80/PATH1 is sent to IHS which, via PLUGIN XML1, then goes to WAS app on HOST1/CLUSTER1.
A http request using DOMAIN2:80/PATH1 is sent to IHS which, via PLUGIN XML2, then goes to WAS app on HOST1/CLUSTER2.
Both requests use the same URL path. I believe WAS PLUGIN XML cannot send requests to different clusters if URL path is the same.
How do I setup IHS to support accessing the same app via two different URLs (but same port number, same path) and two different PLUGIN XML?
Maybe there is something I can do with WAS Virtual Host configurations to help?