[Plugin: custom tables] Multiple filter drop downs

Stefan,
How would you use multiple filter drop downs to lessen the amount of results?
For instance`
[wctselect id=”1″ field=”city” limit=”20″ maintext=”Choose Your City”]
[wctselect id=”1″ field=”cat” limit=”20″ maintext=”Category”]
[wctselect id=”1″ field=”subcat” limit=”20″ maintext=”Sub-Category”]`

Choosing multiple drop down filters resets the previous filter, how would you show the results after all are selected?

Sample at http://www.neighborpro.com/?page_id=203

http://ww.wp.xz.cn/extend/plugins/custom-tables/