Can only view own post.

[Lynne]

I have not seen one like that. You probably would need to write a plugin using at least one of the postbit_display_* hook locations to see if the post user is the same as the viewing user and if not, don't display the post. Or, better yet, play with the original query that gets the posts in the first place. Take a look at the showthread.php page to see how it is coded.