I am using address reservation to assign IP addresses to devices on my home network on the basis of MAC address. How do I go on to prevent specific devices from joining the network via the C1200's wi-fi signal?

I'm looking for something like 'Wireless MAC filtering' on TP-Link's Powerline wfi range extenders.

I want them to participate on the network, I just want them to use the access point near them instead, rather than try to connect to the weaker signal from the C1200. That is, I don't want the main router, which is at the far end of their range, to give them the option of making that mistake.