If a practitioner does a session with the new Protocol, asking it to be applied to all their prior clients and all prior clients of other Lightworker Healing Protocol practitioners, will that allow all prior session work done by all the practitioners to henceforth be included in the pooling of all new sessions extending into the future?

Again the answer must be "no." This is an attempt to, in effect, sneak up on the other practitioners and claim credit for their work and repurpose it for one's own. And this again is an ethical breach. It is not the worst of transgressions because it is for a high purpose but it is nonetheless asking for history to be rewritten, in effect. And the energy of the past simply will not stretch far enough to encompass the new applications that you have inherent in the broad request to have all Protocol work pooled. So in a sense, this is starting over with the new broadened reach. But given that the requests will be done over and over in perpetuity, and the number of practitioners will be growing, you will be more than making up for lost time here with the great number of new Protocol sessions that will be launched in the future with this expanded version of the Protocol, and you will achieve your goals accordingly.