Ronald Huereca

Metronet Log provides a WordPress API for date-based data storage based on a user ID. It’s up to the developer to implement the actual logging and data retrieval, but the plugin provides many helper methods.
You can view the full documentation for the <a href="https://github.com/ronalfy/metronet-log" rel="nofollow ugc">WordPress plugin on Github</a>.
Contributions to this plugin are welcome, so please feel free to weigh in via the support forums here and contribute code on <a href="https://github.com/ronalfy/metronet-log" rel="nofollow ugc">Github</a>.

Metronet Log

Provides a WordPress API for date-based data storage based on a user ID.

tarppa

Write all login attempts where both username and password are supplied to a log file. The logfile is relative 
to error.log and is called ‘login.log’, the format : “TIMESTAMP USERNAME SUCCESS/FAILURE”.
In practice this plugin is a rewritten version of the wp_authenticate_username_password function from user.php and replaces 
it in the login process.

WP Login Logging

Write all login attempts to a logfile by replacing default wp_authenticate_username_password functionality

Metronet Log vs WP Login Logging