Need to know who is connected to FTP

I now have several FTP-users on my Live 3TB.

And i can see on the NAS that someone have downloaded something for almost 24h, so i want to see who is connected.

Can i do that?

Hello, unfortunately that option is not available. 

If you opt instead for ssh/sftp you will have this option.

You also get the added value that is safer because all connections are encrypted.

What is opt ???