You could set them in Application.xml Property settings. I don't think Wowza has a way of knowing what hostname a server is reachable through, or the IP addresses, unless they are set in a VHost /HostPort /IpAddress, in which case there is probably some way.
You can use a hostname in HostPort /IpAddress, and you can get all HostPorts in Charlie's example, then you should be able to look at each HostPort IpAddress. If it is set using a hostname you can get that.
HostPortList hostPortList = appInstance.getVHost().getHostPortsList();
for (int i=0;i<hostPortList.size();i++)
HostPort port =hostPortList.get(i);
String ip = port.getAddressStr();
I think this means you have the default "*" in the HostPort IpAddress fields, i.e., any IP address. The suggestion is to replace the "*" with a hostname (that resolves to a ip on that machine), then it should show up.