Marketo Custom Links per lead

Hello!

I am looking to see if there is a way to create a custom URL for each individual lead that is in a campaign. We have PartnerRef codes to webinars (for tracking) but could soon shift to a UTM code. Either case - we would like to utilize a customized link per lead to track who is registering for a webinar by the specific group they are associated with (not necessarily who they are employed with).

We work in the insurance industry and some webinars are for our broker's clients - so we need a quick/easy way to track who registers for these events based on who the broker invites (so the email/domain are not usable fields to reference in the webinar registration).

Any help is appreciated. Thanks!