As far as I know, this is not possible. Someone from Pars can call back if I'm wrong. The traditional answer is: write down everything and use a good journal reader to filter out what doesn't interest you. Parse.com is IMHO, a lightweight development / runtime environment. The last time I used it, you could not load raw log files.
Curiously, the entire industry has grown around a better and better view of magazines. One vendor ( http://www.splunk.com/ ) even included machine learning to help administrators separate wheat from chaff in their log files.