Woffice allows to create many elements by front end, these are: blog posts, wiki articles, projects and directory elements.
In the Permissions tab, the options are organized by groups:
In each group you can find an option like this:
All roles selected here will be able to create that post type by front end. A button will be created in the corresponding directory page. For instance, for wiki articles:
NOTE: This option affects only the front end, in the back end, the users continue to use the default capabilities of WordPress assigned by default to each role.
NOTE ALSO: The administrator users are always able to create elements by front end, it doesn't matter what you set in this option.