I’d like to limit who can access my journal entries.
4 options are available under “access settings” at the bottom of the “Post a new entry” page.
Using the options under the “settings” menu you can change the overall level of access
(Please note that the access settings of recent posts will not be changed).
The 4 access setting options are as follows.

Public : All internet users, even non-Lang-8 users, will be able to search for and view your entries via Internet search engines.
Share with all Lang-8 users : Only registered Lang-8 users will be able to view your entries.
Share with My Friends only : Only users that are your friends on Lang-8 will be able to view your entries.
Private-Just Me : No one besides you can view your entry.