add a custom option to a multiple list field

[jorge@netcare.mx]

Hi all, thank you by all your help, has been really good to find so many answers on this forum.

I have a question now; Is there a way to add a custom option (is the name of a product from the product entity from the sales pack) to a multiple list field using a formula?

I want to add an specific name from another entity using a workflow.

[Maximus]

Hi Jorge,
Would you describe it more explicitly?