How can i restrict the SA user

From: Aneesh (aneesh.r_at_eostek.com)
Date: 11/26/04 

Date: Fri, 26 Nov 2004 11:15:45 +0530

hi,
Is there any way to restrict the SA access. The problem is that all my
client machine users knows the sa password, and also right now i don't want
to change the password. So i just want to know is there any way to restrict
their access ? thanking in advance
AR