Kent Logan, a San Francisco collector, amasses his art in true corporate fashion: with flow charts mapping what he has and what he doesn't. His most extensive acquisitions include, below from left, Francesco Clemente's Self-Portrait (1984), Mark Tansey's Occupation (1984), Cindy Sherman's Film Still #6 (1977), Gottfried Helnwein's Untitled (Child) (1996) and Anselm Kiefer's Operation Sea Lion (1975). ''She's like a curator with cash,'' says a friend of Ydessa Hendeles