That would be a very cool plugin, but I don't know of any that currently exist for FileMaker. Maybe you can make it?
Could you do it as the OS-level and have a script that opens FM with passed parameters for logging in to the system after the user has been validated? Just throwing out ideas.
Draco - if you read that article, the 3D facial recognition portion is separate than the patents for filemaker.
Unfortunately, since I too think the security features of filemaker could use some updating as well aside from native and LDAP only features.
Theoretically this could be done through a web viewer.
IF you had a web-based service that allowed you to:
1) Take a picture from a webcam
2) upload that picture, and a locally stored user picture, to a remote server for comparison/verification
3) return a yes/no valid result that could be read back out, or auto-launch an FMP:// url
You might want to check out the links at this page:
An alternative might be that you have a Mac OS program that runs an applescript on completed verification and logs that user into filemaker as the end-action. This way you don't need to do anything in filemaker. This would only work though if your OS app runs in a kiosk-mode interface. this is what david suggested above.