You first use New Job, which is like Subcustomer Under the Customer name. Then, all entries where you use Customer, you use Job level, for expense entries, for Invoices or sales receipts, for Timesheets. Now everything is Separated under that customer.
Examples:
Smith and New Garage
Smith and Kitchen Remodel
Smith and Lakefront Home
or;
Customer =Owner and Job Name = Pet name, job Type = cat or dog, for a Veterinarian practice.