Solution

You simply do the following:

  1. Set the Base DN in the SpiraTeam LDAP Configuration Page to Base DN #1.
  2. Import the desired users from Base DN #1
  3. Set the Base DN in the SpiraTeam LDAP Configuration Page to Base DN #2
  4. Import the desired users from Base DN #3
  5. (Repeat for additional Base DNs)

This works because SpiraTeam associates each user with the full LDAP DN path regardless of where it was imported from.