[Haskell-cafe] ghci identifier listing question

Hi, in GHCi, after pressing the tab-key, all defined identifiers are listed. If an identifier was redefined, all old and shadowed versions are listed, too. Is it possible, to reach the (shadowed) values in any way? Another question: Is it possible to show only those identifiers that are defined during the interactive session? I only can list all identifiers which start with a given prefix, but I would like to know if GHCi can show me all identifiers defined in a given module or in the current session (by pressing Tab or alike). Best regards, Daniel