Hello Robert ,
Sorry to say, AxCrypt 2.x does not support different password for different files feature due to some security reasons. Please refer our blog for more info: https://www.axcrypt.net/blog/use-of-different-passwords/ .
AxCrypt 2.x will work without internet(offline) also. So no need internet to decrypt the encrypted files.For more information, please visit here https://www.axcrypt.net/blog/axcrypt-online-vs-offline/ .
Still, you are facing the any quires, please feel free to write a mail to our support firstname.lastname@example.org