Is it possible to work out the following function by means of adjusting the configuration of easyblog? or I should change the codes in php?

A blogger (register) will be assigned a default category (ex. step1) whenever s/he is writing a post and the admin (super user) is the only one who can change the category of a post (ex. from step1 to step2). There is no way for a blogger to browse through the drop-down category list on the front-end side.

Thank you for reading this