This is EXACTLY a best-case-scenario, but I have no idea if/how it can be done. (ie: one user account, username: <user1>, but <password1> unlocks and boots into

This is EXACTLY a best-case-scenario, but I have no idea if/how it can be done. (ie: one user account, username: <user1>, but <password1> unlocks and boots into a typical desktop, and a separate <password2> unlocks into another totally different environment)