In order to block wireless users through the mydlink app or website your mydlink router must be registered to a mydlink account.Step 1: Log into your mydlink account at
http://mydlink.com
Step 2: Select your router to bring up the
Router Status page
Step 3: Under the
Connection List, click on the
block button to remove the selected user

Click
Apply to confirm the settings.
The selected user will now be blocked from accessing your network/internet and is automatically added to the routers MAC Address Filter.