Thanks for your feedback! Currently, only the owner of Sesame is able to change auto-lock settings. Once set, the auto-lock setting is universal and applies to every instance of that Sesame being unlocked, whether it's through the app using an owner, manager, or guest account, or manually. Auto-lock would need to become an account-based setting (like auto-unlock and knock to unlock) instead of a Sesame-based setting in order for what you've requested to be possible.
However, it sounds like you may be interested in auto-locking your Sesame based on location so that Sesame only auto-locks when you leave your home. If so, you'll be able to create an IFTTT applet to lock Sesame based on a geofence around your home. iOS users can join our beta program and test IFTTT now. Android users will be able to use IFTTT once the Wi-Fi Access Point is launched. Hope that helps! - CANDY HOUSE