Limit editing possibilities for collaborators

Hi! Sorry, English is my second language. 

I would like to create a board where the members of the university community where I work would be able to come and participative by adding some post-it. However, I don’t want the participants to be able to edit other’s post-it. Lots of people will use the board which would be available during a month time. I want every participant to be able to add a post-it, or more, and comment. I also want them to be able to see the post-it added by others, but I don’t want them to be able to edit those post-it, to move them around or to suppress them. 

To get there, I don’t want the participants to have their post-it secured with the lock mode (I won’t be there to explain). I would like to restrict the edition mode by providing each participant with the opportunity to edit their own stuff only. Is that an option?

Thanks.