You can filter on one range per worksheet. You can remove the filter and
reapply if you want.
If you're using xl2003, you can try data|list. It looks quite similar to
autofiltering. In xl2007, I think it's Data tab|Table (or something like
that????).
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As a general rule, if those two tables show different stuff, I'd use different
worksheets for each.
It'll make life much easier if you want to insert/delete columns or do any other
processing with those ranges of data.