Not as far as I know. Please feel free to work on it.
Do you have a design in mind? I would suggest maybe adding a "login_attempts" column to the user table in the config database, and having a parameter in config.py to define the maximum number of login attempts allowed. login_attempts would be incremented for every failed login, and set to zero for a successful one. If it's value is >= to the maximum in the config, login would be denied. There would also need to be changes to the user management dialogue to show the status for each user, and reset them.