Hello @matt p11 👋, Welcome to Interconnect 
Q - I'd like to tag users based on which specific link they clicked within an email.
A - You can tag users globally once they click any of the links in the e-mail. It's not possible to tag them based on specific links.
Workaround: If you have some development skills or have an in-house developer you can build the following link structure:
domain.com/newsletter/IntercomID/3week; domain.com/newsletter/IntercomID/6week; domain.com/newsletter/IntercomID/2month
Once the user clicks on this link, you can send an API request to Intercom to tag the following user with a specific tag.
I hope this will be helpful.
Let me know if you have any further questions about this topic, more than happy to help.