A list item in an F2 Lookup can be setup to retrieve information from your contact manager. For a list of fields available for use, go to Contacts -> Setup Contact Manager menu, click on the Outlook Setup button, and then click on the [DataLink Setup] button on the Advanced tab. Under the Contact Manager Field drop down, you will see a list of all the fields you can use to pull additional information. Below is an example of their use, where Lastname is the actual field name.

Example:

~Outlook_Macro(Contact->Lastname)