I have a buddy that purchased a Lion server and he wants to have remote clients connect to his server and upload files (mostly PDFs). He is running this server out of his home and will be using DynDNS.org for his dynamic IP address. A secure connection is needed. Each user will have a login and a specific folder tied to that login that only they can upload files to. My question is will SFTP handle multiple logins and folders tied to those logins or will something more robust be needed? If SFTP is the answer, is it hard to set up? I know how to enable it but haven't looked much beyond that. I am a novice in Mac products but have a general understanding of networking and file sharing.