Nope, Morgan was playing for the lions and Ireland at the same time. But knowing England they will give him one ODI and then drop him
Even if they do that, the ruling states that a player can switch between teams as appropriate and with the agreement of the two boards. Essentially, Morgan can play for Ireland still if he wants to and the ECB agree to it. Ireland needs to have a first class cricket circuit in place though before it qualifies for Test cricket, ergo you won't get many switching back if they believe they are good enough. At least not until some steps are taken to move cricket in Ireland forward. I for one hope they do.