Communications tied to specific subscription

I'm setting up a site with Membership to serve dripped content. In Communications, I'm setting up emails to send at 7 day intervals to remind them to login to see the new content available to them at that time. So far so good...

However, this only works if you have one series of dripped content.

I plan to add other subscriptions for different series of dripped content. Unfortunately, the emails are tied to the membership, and not the subscription. Is there a way to set up a second set of emails that are tied to a different subscription?

If not, I request this feature to be added in the future.