Redmine

Hello,
To project manage a mercurial repository, and track issues I am using redmine.

The workflow I want to use for the mercurial repository is branch based, i.e people are welcome to create branches and push their branches to the designated server. However I want to restrict access to the default(trunk) branch, so that all changes are merged by me into the default(trunk) branch. This will allow control over things like code-review for each branch before merging it to the default(trunk) branch.

Is there any way to use redmine to manage access to branches for mercurial repositories?
I guess the workflow is somewhat like what I see on GitHub

Regards