Does eNewsletter have mailing list rules?

I thought I had seen group "rules" in eNewsletter, but it's possible that I am thinking of a different mailing software.

Many mailing lists have the ability to do things such as:

When a user is subscribed to lista and then subscribes to listb, automatically unsubscribe the user from lista. This allows for situations such as a prospect becoming a customer, etc.

Is this available in eNewsletter?

Thanks.

Danita