When sharing the user and usermeta table between multiple wordpress installations using the same database, any role given to the user is only valid for a single wordpress installation.
This plugin ensures user roles, user capabilities and user settings are shared between the multiple installations. This is configured using a wp-config constant.
Any role set in any of the installations will be reflected in all other installations.
Caveats:
- Compatability with wordpress multisite is unknown
This plugin is available for download to be used on your WordPress self-hosted installation.