Is there any way to auto-populate the product version field on a request based on the live version field of the account when the contact for the case is selected?

i.e.  when the support rep sets the contact for a case, the product version field of the request is populated with the live version field of the contact's account.

I had a look at the Field and Form Rules but you can't choose an action based on the Name field changing.

Thanks,

Chris