Install SITE EXEC (see Knowledge Base), then:
Code:
site exec type c:\ioftpd\logs\xferlog | find "username" | find "filename" | find "_ o"
This will show one line for each download that "username" did of "filename".
If you replace "filename" by a directory name, it will give you one line per file downloaded in this directory.
Code:
site exec type c:\ioftpd\logs\xferlog | find "username" | find "_ o"
Will show you all the files he downloaded (might take a while!)
This could pretty easily be made into a batch file, and called from a custom SITE command, with arguments being username and optional search string, but I'll leave that exercice to someone else.