The definitions are straight forward and simple. You just setup the url parameters for each rule and if they match, caching will be turned off for anything that is called with these parameters.
Example rules for com_content (each line is a separate rule that will fire upon match):
The first rule will prevent caching for the whole com_content extension, while the 2nd rule will prevent caching for a specific article. The 3rd rule will prevent caching for all article details (because of the ?).
Keep in mind that the above rules need to be written in parameter form, even if there is SEF enabled. This means you will need to know the parameters an extension accepts!
Actually I was going to give less rating for the lack of documentation, but I figure out how to use it in the first try.
By entering "event=submit" in the configuration textbox I was able to achieve the wanted results. A bit more documentation (in the plugin or on the website) would've been helpful, but overall a good plugin.