I'm pretty sure this has come up on meta.SO and not gotten anywhere... I think the official position is that other than tag filtering, everyone sees every question.

e.g.  http://meta.stackoverflow.com/questions/152353/filter-questions-by-user-reputation

and http://meta.stackoverflow.com/questions/157616/independent-filtering-sorting-on-questions

Ah, here's a Q that seems official (with Status Declined on it) http://meta.stackoverflow.com/questions/3987/can-we-filter-questions-by-reputation