Welcome to WebmasterWorld Guest from 188.8.131.52
Forum Moderators: open
It has the options:
In the text,
In the title,
In the url,
In the link to url
I think that should cover all of them.
Perform a search and then notice the resulting url string that is built in the address bar.
If that is not enough filters, notice the + and the - graphic link to add more filter form inputs (that's nifty).