Can support subgroups? [feature proposal]

Some times we may need subgrous, for example: Project A includes multiple modules: server, ios, android and web

And we might prefer the path like below:

http://git.server.com:projectA/server/api.git ---only server group members have access right. http://git.server.com:projectA/server/cms.git ---only server group members have access right. http://git.server.com:projectA/web.git http://git.server.com:projectA/ios.git http://git.server.com:projectA/android.git