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This feature has not been implemented yet. Maybe a job for YOU???
For everything you upload and own, items or entire courselets or courses, you can set rights that determine (A) what the content can be used for, i.e. where it is shown. (B) You can determine if/which partners can use your content. For example, you can say that your content can only be used on the Letexa site itself, but not by any other projects.
You can set that your content can only be used in projects that are under a certain license. For example, you can say that your content can never be part of a commercial product but only of products that are under a Creative Commons license. You can exclude or include certain types of uses of youur content.
At last, you can get an overview over where your content is being used and by whom, and you can see and (dis)approve requests by others to use your content in their projects – of course you can always allow certain uses by default, and require approval for others.