Hey Doug, you can do this through Workflow automation.
Use the deal created trigger and update person fields. One of your options will be label.
Hi @Doug Horner !
This would require using an automation, and at the moment automations don't have a trigger condition of the "Lead" type, only "Deal" type.
However, like @Joshua Hindman suggested, you can create an automation that applies a label to a deals converted from a lead. Make those deals consistently recognizable by the automations by adding a particular prefix to their title, for example, and make that the trigger for your automation.
And thank you for your suggestion, I will send it over to the team for consideration!