We have a lot of hosts running few java applications, each host and each application with different jmx port.
Now there is only one way to monitor such hosts - create interfaces and items for every host (templates could not be used as we can't select interface in it).

Ideally monitoring of such host should be made that way:
LLD discovering all jmx ports and item prototype with {#JMX_PORT} in "Port" item attribute.