I run a simple network using Win Server 2012 R2 without domain or active directory. I use the server for dhcp/router/dns/gateway/file server. I would like to restrict certain devices (by IP/MAC address) from accessing the internet based on time and day. I read about the Day and Time Restriction under Network Policy Conditions but I think it applies to domain/AD environment. Is there a way I can achieve my objective? Thanks.