Roadblock for Mac
Block Websites
The Block Websites custom rule lets you block websites.
Name
The name of the custom rule.
Websites
Add one or more websites to apply the custom rule on the specified websites or on all website except the specified websites. If you don't specify any websites then the rule will be applied on all websites.
When you add a website, you need to specify its domain name (e.g., example.com, www.example.com, etc.) and whether subdomains are included. For example, if the domain name is example.com and subdomains are included then the rule will be applied on example.com, www.example.com, images.example.com and so on. If subdomains are not included then the rule will only be applied on example.com.