The blog comment system allows multiple branches and threads of comments and replies for each post
Comments are moderated from the blog function in the building tool
or from the "comments" tab in the panel

In the site options there is a menu for Blog commenting restrictions the options are

• None (guest posting allowed)
Normal unrestricted commenting
• Email input required
Require the input of a email address
• logged in users only
Only users that have registered confirmed their email and logged in can comment

In the "profile settings" on the Account page You can set a "community name"
This will be used when posting comments on all xtgem sites when you are logged in
If you have not set one you will be prompted to set one before you can comment