How to manage the organisation change of one ressource

Changing organization of a resource is easy.
What you expect is changing organization but keep work record summed up on the old while new record will be added to the new.
This is not possible.

Change of the model is then quite heavy.
Change a 1-to-many to many-to-many relation...
I mean actually an Organyzation can have several resources, but a resource can have one and only one organization.
In the model you need, an Organyzation can have several resources, but a resource can alos have several organizations.
This requires new table in the model, and change all features linked to Organizations.
Moreover, whet you expect is an history, so that each work input is attached to a dedicated Organization. 
All this is not simple, and I'm not sure we'll develop it one day unless someone sonsors the evolution.