Not sure if it's been mentioned, but article 12.10 of UEFA's regulations for this season's competition states:
In principle, from the group stage, a club must play all its matches in the competition at one and the same ground. Matches may be played either at the ground of the home club or at another ground in the same or another city within the territory of its association, or, if so decided by the UEFA administration and/or the UEFA disciplinary bodies, in the territory of another UEFA member association for reasons of safety or as a result of a disciplinary measure.
So all home games will have to be played in Tallaght or whatever ground is chosen.