Motorola MG7540 User Manual page 48

Here is an example entry to allow access to Jill_Site.com from 4:00 pm to 8:00
pm:
Now you can add another device, for example Joey's PC, to the Whitelist. First
click the Add button.
Then enter the entry name, device MAC Address, site to allow, and start and end
time for the entry. In the example below, we have named the entry Joeys_PC, and
the site Joey_Safe_1.com, with active time from 10:00 am to 2:00 pm.
Remember to click Save.
Click the + sign to add another site to allow for this device:
Click the Add button to configure a Whitelist for yet another device, if you like.