Easy-peasy. Click on the user's handle in the leftmost column. In the pop-up, select "View Forum Posts". There is a limit, but you get the last 300 posts. Title and the first couple of lines in each post. Easy to scan for quality, where quality is based on your OWN criteria. Might not be 100% accurate, but after scanning a couple of 30 posts/page pages, good enough for forum work.