Hi WAS,
This is the redirect rule I wrote for my app team with the same requirements as yours:
RewriteCond %{REQUEST_URI} ^/appName/
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule / https://
new.url%{REQUEST_URI}$1 [R=301,L]
Instead of doing a redirect match, I created a rewrite rule. This way, any request for appName will automatically be directed to the URL you specify.
This works in a WAS 7/Network Deployment/Virtual Enterprise, clustered environment, but you should be able to tweak it to meet your needs.
Hope this helps!
Danielle