can commons ftp api cause files to be set with wrong owner on server?

[jo˙ffffe3o Paulo souza]

I´m using commons.net.ftp package to make the ftp transaction of files from one server 
to other.I´m connecting for example with an id = bla.
So all files stored by the method storeFile from ftpClient class should be owner "bla" 
on the server(AIX).Can somebody give me a tip if it is either most likely a probelm on 
the ftp or on the server AIX?

                
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