No.

As there are no fitting events to subscribe to when a user log on (that I know of), I guess you'd have to put your code in your templates, and redirect the user to a change password page if the password is too old.

You could add a property to the user profile to store when the password was last changed and redirect based upon that value. If you put this code in your master page you'd force the users to change password since they wouldn't be able to usse the site if they don't.

I'd be rather annoyed  by such a solution though :].