Permissions Problem

I have a client who wants to setup a folder in their account and allow people to anonymously connect and upload images. Once they have uploaded the files the client can see the listed files that they have been uploaded but can not delete or alter the files or any other files in the folder. Also it does not matter if they see the files listed in the folder before they upload their own what ever files are already there they would see those when they connect to the server 'of course'. I have turned on FTP Service for the client allowing Anon-FTP thinking I could do it that way but I am really not sure how to proceed. Any ideas on if this can be done on a Linux box? I would prefer to do it on our Linux box but we could do it on our Windows box also if it is not possible to do it on the Linux box.

Any help you be greatly appreciated!

 

 

 

 

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