Hello Hick22,
Create a user file with that individual in it,an FTP folder to allow it. If any of your upstream scenarios block executables (several ways to do that) make them inactive for this folder. Right click on the FTP folder, go to Properties, add a route for the FTP user group, [add in a site zone restriction if you want to] that should look something like this:
FTPusers-- * [or prespecified zone] -- ANY
That ought to do it..