Is the monthly amount paid for sponsoring an orphan considered ongoing charity (ṣadaqah jāriyah) for the deceased father, and can the one giving charity sponsor another orphan for himself?

It is permissible to donate the sponsorship of an orphan and dedicate its reward to the deceased father, as he benefits from it by the consensus of the scholars. It is also commendable for you to donate the sponsorship of another orphan, as this is among the encouraged acts of righteousness. Perpetual charity (Sadaqah Jariyah) among the jurists is an endowment whose benefit endures, whose principal remains, and whose proceeds are spent on good deeds.