Can I use Bitwarden for access to a stand alone application with password?

Welcome, @Steven_Kramer to the community. There are a few feature requests that address this question. After you have browsed around a bit, feel free to go vote for one or both of them.

In short, the desktop app facilities use of biometrics, but it does not yet have native app autofill.

https://community.bitwarden.com/t/macos-native-autofill/17387/124