Yes, try 'get station' with the following options.
get station [list|info|stats] {all|}
Options list: List stations associated to the WLAN.
info: Display station information.
stats: Display station statistics.
Example rkscli: get station wlan8 list
ADDR AID VLAN CHAN RSSI IDLE CAPS STATE HTCAPS
00:22:fb:ad:1b:2e 1Y 1 44 43 0 ESS PRIV SHTSLT QOS HT
OWL 40MHz SGI20 SGI40 GFLD MAXMSDU RSN AES AES PSK WME
OK
rkscli: get station wlan8 info
MAC Addr AID Rate RSSI VLAN Idle ERP State Flags
---------------------------------------------------------
00:22:fb:ad:1b:2e 1 6M 43 1 0 0 a2b 0
OK
rkscli: get station wlan8 stats
(null): 00:22:fb:ad:1b:2e
rx_data_frm 213148 rx_mgt_frm 10749 rx_bytes 81983195
rx_wepfail 1 rx_unencrypted 1
tx_data_frm 205015 tx_mgmt_frm 5392 tx_bytes 135092365
tx_assoc 1 tx_auth 1