1. Navigate to Lists > More Lists.
  2. Add a new Advanced List, or edit an existing List.
  3. Click the Select Objects tab.
  4. If not already added, click and add User Base (from under Constituent Information).
  5. Click the Display Fields tab.
  6. Click the Select Fields... link.
  7. Expand User Base.
  8. Check the box to the left of Host ID.
  9. Click Select in the upper right corner.

User-added image