You can create a log of of all POST commands to the General News Category.
You will have a very hard time trying to get the actual comments to log.
POST data is usually encoded form data and you cannot generically determine what is the comment and what is the rest of the post.
I've done this with social media sites to capture what was POSTed to other people's walls or chats.
But the data is going to be tedious to discover and decode (you have to encode it as Base64 in the logs):
Eventually, with enough effort, you can get what you are looking for.
...not to mention the privacy violations this could pose legally.
So, yes, it can be done. But I don't recommend it.
thanks for the response..
i tried to make a rule like yours but it didn't work.. the main log folder is created under user defined logs but these is no files in it..
i don't know why but should the log file has a header at file system logging setting??
if yes please give it to me..
The headers should not matter.
One thing I forgot to mention is the rules go into the Policy Rules during Request Cycle, not the Logging rules.
I don't have the original rules anymore, just the screen shot.