You can create as many different blogs as you wish. You can limit access to a blog by placing it on a restricted page. If you make the page public, you can still use the blog gadget settings to control functionality for visitors and members.
You can read more about setting up blogs on our Blog help page.
If you are looking on more information on how to use blog, you can find it here.
This is another sample blog entry. Depending on your readers' access permissions, they can comment on your posts, and reply to comments.
You can learn more about setting up blog pages on our Blog help page.