Allied Telesis AT-WR4500 - Manual (Page 248)

248 AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers
RouterOS v3 Configuration and User Guide
Example
To get the list of active users:
[admin@AT-WR4562] ip hotspot active> print
Flags: R - radius, B - blocked
# USER ADDRESS UPTIME SESSION-TIMEOUT IDLE-TIMEOUT
0 ex 10.0.0.144 4m17s 55m43s
[admin@AT-WR4562] ip hotspot active>