If you are using WOL Proxies and you have logging turned on the client to log everything, then you will see the MAC addresses of the machines that the WOL proxy will try to wake up.
The following SQL query will return the number of clients that are acting as WOL Proxies.
SELECT count(*) FROM aclient_prop WHERE wol_proxy = 1
The following SQL query will return the Names and IP addresses of WOL Proxies.
SELECT c.computer_name, d.ip_address
FROM aclient_prop a INNER JOIN
computer c ON a.computer_id = c.computer_id INNER JOIN
computer_display d ON a.computer_id = d.computer_id
WHERE a.wol_proxy = 1
Before the server sends a Wake on LAN proxy packet, it will check the database for any clients that are Wake on LAN proxies. The server will then send the proxy packet and tell each Wake on LAN proxy to send a Wake on LAN packet on their segment. Each proxy generates a new Wake on LAN packet for its segment.