We would like to extra secure some connections with Two Factor Authentication. (Only some)
Is this possible in some way (Because its not only)
Two Factor needs internet of course.
there's currently no way to add two-factor authentication to royal documents or individual objects inside the documents.
You can however secure your individual connections on the server side which would be a lot more secure anyway since users can't simply switch the client they use to access a server to bypass the MFA.