To see who's logged into the database i allways use ldbview.exe.
It shows you who is/was logged in the database. The ldb file was dropped the moment every user closes the database.
You have to locate the LDBVIEW.EXE on the internet.
Have you considered just opening the LDB file as a text file (as in, use Notepad)? It's pretty simple to iterate through what's in there and get what you're after.