Certainly, each system requires a new subscription and Alarm.com account. Simply log into your suretyhome.com account and purchase a subscription for your other system.
Follow the activation steps to get the panel connected to the new Alarm.com account. You’ll need to enter a new unique username for the new account.
After you activate service you can link the two Alarm.com accounts via the steps here so you can access both with one set of credentials.