Towards the bottom of the page next to your "List Stats" you will see a "Subscriber Search" area. From this area you can search for a subscriber based on their email address or name. So, for example.com the empty search box you will want to type the email address of the subscriber you want deleted and then click the "Search All Lists" button.
This will bring up your subscribers information for any list that they are subscribed to. To delete them from any list you will just want to check off the check boxes in the left column next to the lists that you want them deleted from. Once you have the lists you want the removed from selected just click the "Delete" button to remove them from those lists.