Viewer with filtering for files generated by log4net ?

Hi

I'm looking for a tool to view and filter log4net text output (I don't
wan't to filter the output itself through log4net configuration,
rather filter over an already generated log after a problem occurred).

I've seen this tool : http://www.codeproject.com/csharp/TraceTool.asp
but it doesn't seem to support filtering (eg : filter lines which were
generated by a log named xxx).

Is there any well known tool to do that ?


thanks!

Thibaut