I have a svn repository, but I want to control the access, For example one of the group have access for
test folder but don't have access for the
test2 folder. It's possible this, or I have to create different repository if I want to reach this goal?
The way you set up permissions and ACLs in a SVN repository depends on the way this repository is accessed. You can apply restrictions to each folder in a repository only with the first two methods.
A full answer here would be too long and ineffective. So I invite you to read the SVN book, especially the chapter 6: server configuration.