No.
If you need to allow both people to work on the same modules at the same time then you are ruined. You cannot do it unless they sit on the same chair and use the same keyboard/mouse
If you want them to work on different modules/classes/forms then you could make two copies of the MDB for the developers, and have a mchanism of importing the changed objects into a master version after each person has completed their work.
This approach would be acceptable in my view however, your communication would be paramount. You would need to ensure that each developer stuck to his or her own objects and did not make any changes to the other developer's objects (or no changes that they wanted to keep).
Perhaps a better approach is to write some code to export all objects (check out the SaveAsText command!) to files, then use conventional version control software to manage these files. You can go far with this method but it's slightly more tedious to manage. Much safer though. You'd have to check out the objects in your version control app, then import them with loadfromtext. This means they overwrite the existing object of the same name. Once you are done developing, you would have a function that "savesastext" each of the files you previously loaded (for checking back in to version control) and perhaps you could have it warn the user about all of the objects they modified that wer enot originally loaded.
I think you get what I mean anyhow. It's all feasible - safer than relying solely on communication because you are using proven version control techniques.
To be honest though, I have never worked on an access application with other people so I don't know if Soruce Safe or any of the other version control suites help here. My guess is that they treat an MDB as a binary file so you lose out on most of their features. At least the second suggestion I made allows some version history capability.