In addition to using phpFox on one of our sites, we also own and operate another website: Password Sentry
We have been thinking of creating an app which will integrate Password Sentry with phpFox to track and log user logins to prevent people from sharing the same account, and to detect and block hackers from accessing accounts. We do this for a number of apps, and has proven to be quite popular with WordPress.
If we see a popular demand for such an app which integrates phpFox and Password Sentry, we could roll it out in manner of few weeks or months,