1) Open a search window or tab by right clicking on "Search" in the top menu. Then, working down from the top:
2) Leave search terms blank.
3) Leave forum selection at default, or enter a specific forum.
4) Select "Thread Titles".
5) Enter member name of interest.
6) Click "Search"
This will give you one page of the most recent topics started by that member. Multiple pages is not an option, but by selecting specific forums at (3), you can get a lot of results, maybe even every topic ever started by the member.
Moose