Yes, a lot of users are using it like that. But you must be aware that JomSocial was designed for Internet and there are some features that will not work without it e.g Google localization. So JomSocial do some external calls and if you want to use it for intranet, you'll need to remove them.
Also support for intranet is limited as we can't get inside and properly debug any issues.
- Instead of saying: 'it's not working', explain the problem in detail.
- Screenshots with the URL visible in them and the problem marked are more than welcome.
- Tell us how to replicate the problem, we can't fix it if we can't find it.
- Make sure that your site/server meets JomSocial System Requirements
- Make sure to setup JomSocial Cron Job
- Always provide us with access details to the backend and ftp. We need it to debug problems.
- If you have a similar problem, but a solution you found isn't working, open a new thread instead of 'merging' with an existing one.
- Use the "Thank You" feature on any post that helped you