When creating a quotation or invoice, you can set which staff member should receive the revenue for any payments made by your clients.
In the "Client Details" pane, use the "Assignee" field to select the appropriate staff member.
When an appointment is selected, it will attempt to automatically set the assignee as the attendee of that appointment.
Keep in mind that this field is hidden for single operators. Your account will automatically be selected as the assignee.
When the document is saved, the assignee will be visible in its dialog.
You can then use the Invoice & Payment Summary widget on your dashboard to generate a report of all payments which have been made against that staff member/technician.