rbad3

Hi, I have Windows Server 2008 and I use it for a file server on my network. I use this server to share various files. I would like to implement a method of higher control of who exactly has access to my files, using usernames and passwords. I have done a fair amount of googling, and I have seen some solutions using "limitlogin" & "CConnect". Unfortunately it seems the above mentioned solutions require complex procedures using Active Directory (at least to me) or some configuring client-side. I have no access to the client computers. So far I have managed to disable my guest account and create users via local users and groups. This solution seems to be simple, however I have found that more then one user can connect through a single account/username. Is it possible to limit an account to one concurrent connection at a single time? Any help would be greatly appreciated!