When you FTP into your Home Directory, you will see a file named access-log. Download this file and open it in any word processor or text editor such as NotePad to see exactly what files were accessed, what domain the visitor came from, the dates and times of each visit, etc.

Advanced Option
If you would like to see domain names in your stats and other programs rather than just IP numbers, put an empty file in your wusage directory called dns (no extensions). This will act as a switch and reverse authentication will be activated for the domain.