In server.xml in Tomcat/conf
<Host name="www.mydomain1.com" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Alias>mydomain1.com</Alias>
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="myfirstapp_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b"/>
<Context path="" docBase="mydomain1" debug="0" reloadable="true"/>
</Host>
<Host name="www.mydomain2.com" appBase="webapps" unpackWARs="true" autoDeploy="true">
<Alias>mydomain2.com</Alias>
<Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
prefix="mysecondapp_access_log." suffix=".txt"
pattern="%h %l %u %t "%r" %s %b"/>
<Context path="" docBase="mydomain2" debug="0" reloadable="true"/>
</Host>
Then create a folder for each domain under webapps.
Create a separate landing page for each app and put it in webapps/AwareIM. Make sure each one points to the domain of your app name.