With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cermResGroupResUserTable
Cisco Embedded Resource Manager Resource Group Resource User Table
1.3.6.1.4.1.9.9.510.1.2.7
This table has list of resource users present in each resource group.
Back to CISCO-ERM-MIB MIB page.
IPHost Network monitor allows you to monitor cermResGroupResUserTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.