Capturing Jornaya Lead ID & Trusted Form Cert ID can be done at the Vertical Level.
From the Main Menu, go to Settings -> Verticals. Click on the Vertical Name to open the Vertical Window.
From the Vertical Window, Go to Settings and Click on TCPA Compliance Tab.
By checking the box "Capture Jornaya Lead ID & TrustedForm Certificate ID Fields", the Jornaya Lead ID & TrustedForm Cert ID Field will be displayed in the Posting Instructions.
Note: You can override the vertical settings at the Offer Window under Settings...