Hi @Sam-I-Am We had this discussion with our accounting team that they may want to update memo or some other fields sometimes so they just want to lock the editing of the total only as they still need an edit access to edit other fields, even after payment has been deposited. And then there are some other users outside that has edit access for Invoices for the same reason - they may require to update some Memo fields or some other detail in Invoice.

you can add the following condition to the "Lock Record" state - User Role != Administrator, other_roles. This will let the user with these role edit capabilities but for rest it will be locked.