I recall a key-combination, in a pre-Mavericks OSX, that could be pressed after entering one account's info for initial startup FileVault volume decryption. The key-combo prevented a full login of that account, instead dropping again to the login prompt, for login via another account.
However, I can no longer find any reference to this capability, nor re-discover the combination through trial-and-error.
Does this option still exist? It was convenient.
(Of course, I can immediately log-off that FileVault account. But in addition to that extra step, when next logging-into my real work account, I never get the question that allows cancelling the annoying re-opening of all apps open at the last crash.)