Hi Rachelle, yes you are.
Go to your account and click the "Earnings" tab.
In the settings section that pops up,
Click the "Referral Trackers" tab.
In this section you will see statistics for each tracker you have set up and by clicking the actual name of each referral tracker, you will get the name of each hubpage user who has signed up under that tracker.
Clicking the name of the hubpages user will take you to their profile page so you can choose to 'follow' them and become a 'fan' and comment on their hubs.
Hope this helps,