This information is already listed on page CTK - Activating the ScreenSaver when a Smart Card is removed in section (2).
If you have already activated the screensaver working with smart card, you may disregard this information.
You can turn off FV2 logon passthrough using the following command:
defaults write /Library/Preferences/com.apple.loginwindow DisableFDEAutoLogin -bool YES
This will allow you to use your usual account password for FileVault and then the our Smart Card to login after boot.