Unique Links

Hi, 

I was wondering if there's a way to customize links for each recipient of an email. For example, we have an email sending to group leaders of a specific initiative. The link will push to our own external form (non-Marketo) where the leader will input information. We'd ideally like each for to have it's own unique identifier for each leader. 

Is there a way to do this with tokens?

Thanks, 
Stephanie