Redmine

Restrict root and child trackers to a certain list.

This plugin depends on A common libs plugin. Make sure you have the latest version.

Clone the repository in the plugins direcotry and restart Redmine:

git clone https://github.com/ZitecCOM/redmine_restrict_tracker.git

Go to "Administration > Plugins > Restrict Tracker - Configure".
You will see a list of available trackers with their ids.
Configure the parent for each tracker by adding their ids in the text fields, separated by commas and check the "Active" checkbox to enable the rule.
When you are done, press "Apply" for the settings to be saved.

Go to "Administration > Plugins > A common libraries - Configure" and make sure "Select 2" is enabled.