Just an aside, there are some circumstances in which you don't actually HAVE to mention the local bishop in the Canon. The ..una cum Antistite nostro N. et omnibus orthodoxis... Can actually be taken to mean a local, religious, major superior such as an Abbot. If memory serves there is actually a provision for it in the old Missale Cisterciensae, the pre -VC Cistercian Missal. As far as I know that should apply for all other abbots as well, maybe even for some priors. Does anyone know what the Dominican Missal says on this point?
That may be the case for the use of a Missal other than the Roman Missal. The Roman Missal does not provide any prayer for a superior other than the local Ordinary and Pope.
A religious order that uses the Roman Missal would not have this option.
I would imagine that the Order of Preachers' Missal (Dominican) is similar to the Roman. The Franciscan Missale Romano-Seriphicum is identical to the Roman Missal in this regard.
The Roman principle here is to recognize the Apostolic hierarchy, with whom a Catholic is one. If a superior is merely a priest (and not a bishop) he is not part of the Apostolic hierarchy, so it would seem contra-principle to include him.