[CentOS] ip based acl at snmp v3?

Mon Oct 18 12:35:04 UTC 2010
MontyRee <chulmin2 at hotmail.com>

Hello, all.
My system is centos 5.x and I would like to set IP based (acl) accessl-list at snmp verison 3.
As I know, at snmp v1/v2c, we can set acl like below.
------ snmpd.conf -------- 
rocommunity public
rocommunity public

rouser testuser
createUser testuser MD5 "passwords" DES 
But, how about snmp version 3? 
I searched and tried, but I could't find the answer.
Surely, I can set hosts.deny or iptables, 
But I want to know how to set acl at snmpd.conf.
Thanks in advance.