I found the post. Thank you.

Sriram Gullapalli

I tried to re-collect it a lot and found the way. It is very simple. [1] Download the latest copy of IP Messenger from http://www.ipmsg.org/index.html.en (you might know this).
[2] Extract the zip content provided by.
[3] There is a direct ipmsg.exe file which generally we use. Avoid this and find setup.exe among the extracted content.
[4] Install it to the regular path. It will ask to start the IP Msgr once it got installed. Start it.
[5] Now to run another instance, in the run dialogue, type ipmsg.exe 1518 (any port number which should not be in use). That’s it. This creates another instance.
[6] Now if we want the other person to be exist in the same port, they need to do the same procedure. Then both users will be listed.

This is how you can run n number of instances.

Hope you understood this I used this when I tried to chat with my girl friend – privately. We both used other port number, so that no one has identified us. Another log will be created automatically if settings done in proper.

Thank you,
Sriram Gullapalli

I’m a regular visitor of Technospot. Thanks for sharing such a wonderful tech information.

Well regarding this post, Long back I used IP Msgr and I’m sure I have used two IP Msgr instances at a time by running them in different ports. As you said, we can not configure it in GUI, but there is a way we can run it on different port.

Thanks,
Sriram Gullapalli