Hi sokoloff, thanks for the feedback.
We actually support having the same email address for multiple alarms in the system. We also have regex trigger rules for each alarm, which are based on the subject and/or body of the trigger email. This means that you can set up a single email address, and trigger one alarm if "port XX on switch YY" is down, and trigger a different alarm if the "CEO video conference network" is down.
It might be easier to discuss your requirements over email. My address is alex[at]pagerduty[dot]com.