During the design of the workflow, you can use a data transfer event and store the owner of the current work item in a data field. You should use the 'Activity Instance Destination' field from the context browser

First off, thanks for the reply. Your solution seemed very promising, but unfortunately did not solve the problem. What I did to test the solution was to create 2 new Data fields and then use a data event to populate those fields with the name and email of the destination user. Then I had a Notification event right after that which reported the captured values. The first (name) simply came back as K2Server and there was no value for the email field. Is there a possibility I could have configured something incorrectly?

You'll need to set the advanced destination rules to:

Plan per destination --> All at once

Create a slot for each destination

Resolve all roles to users and groups

http://www.k2underground.com/forums/t/13293.aspx

Note that there are a lot of options around the destination rules so K2 created a whitepaper discussing the options as well as there are videos on the underground as well.