LastPass provides the option of restricting access to your LastPass account to specific mobile devices. To view your settings for mobile access, launch your Account Settings and select the sixth tab over from the left, ‘Mobile Devices’:
Each time you attempt to login via a mobile device, the mobile device’s unique identifier (UUID) will be added to a list on the Mobile Devices tab.
From within the Mobile Devices tab, you can check the ‘Restrict mobile devices to the specific UUIDs listed as enabled below’ checkbox to enforce the restriction on your account. You can also enable, disable, and delete specific mobile devices.
LastPass does not restrict mobile login by default.