Hi Sonia,
One way, assuming you have full access to the project's Logging, could be to export (to CSV) all logging from the project. You could then open the CSV in Excel, and use Filter->Text Filter-> Contains on Column D ("List of Data Changes OR Fields Exported"): enter the field name, followed by a space and "=", and after applying that filter you should then only be seeing rows of the Log where the field you are interested in was edited. You will see the date, time, user, and record associated with each change.
Jeff