Any user can create any page in any namespace.
Once created, that user becomes in effect the "owner" of the page, and only that user can edit that page.
Yes, except that an administrator or manager also has write access.
Any user can view any page in any namespace.
Only if the user has read access through the ACL permissions.
Any user belonging to the same group as the creating user can edit the page ?
Does that apply here?
No. Only the user who created the file and the admins can edit it. Which is what
strang3r asked for. He can set
* @ALL 1
* @user 4
which gives everyone read permission and users create permission. The plugin stops anyone who hasn't created a file from editing it. It's not a solution for wikis where groups have to edit the same file.