Redirecting after submission – on a per form basis

Hi. About this:
https://contactform7.com/redirecting-to-another-url-after-submissions/

If we are not to add it on the on_sent_ok hook, which is per form, we need to know how to do it per form using this generic code. I think this code will do it for all forms, but we have different forms that require different redirects.
Thanks
Laurence