With IPHost Network Monitor you can run simple snmp requests against a HP device in your network.
hpVlanAddrTable
hp Vlan Address Table
1.3.6.1.4.1.11.2.14.11.5.1.3.1.1.6
A table describing the MAC addresses that are currently associated with a specific VLAN. Entries are added to and deleted from this read-only table automatically as they are learned from the network.
Back to hpprocurve-hpvlan MIB page.
IPHost Network monitor allows you to monitor hpVlanAddrTable on Hewlett Packard device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.