How to find the table and user in the session ?

From: Vasu Bolle - ISDX <vbolle_at_mail.maricopa.gov>
Date: Thu, 15 Jun 2000 13:58:39 -0700
Message-Id: <10529.109467@fatcity.com>

Dear List ,
Is there any way to find the users (currently log on to ORACLE ), and their associated tables(currently updated , but not commited) as shown below .

user                    Table
---------                -------------
scott                   emp

.....  

Thanks in advance, Received on Thu Jun 15 2000 - 15:58:39 CDT