Yes, there is. Click on "search" in the ribbon along the top of the page. Pick "advanced search" from the drop down menu. In the page that pops up, put prudent_one (with the underscore; quote marks aren't necessary) in the "Keyword(s)" box. Leave all the other boxes alone. Go down to the bottom on the left side and make sure you have selected "show results as" -- "posts" rather than "threads".
Click "search now" at the bottom center.
Et le voila! A series of posts in which you are quoted or otherwise mentioned, but not posts that you authored (unless you quoted yourself).
Fell free to contact me if you have questions or problems.