It is possible to power on a local network neighbor by sending it a Wake-on-LAN magic packet. For this, you can click on the Wake-on-LAN button of a neighbor, or select several neighbors and click on the Wake-on-LAN button on top of the page.
Beware, for that waking up to work, targeted neighbors have to be configured to accept Wake-on-LAN packets. The server agent have also to be turned on.