Hiya leytone10,
I almost certain that information can be given about people who were in residential institutions throughout the Republic of Ireland rather than the four areas you mentioned. The Origin teams are based in those areas. This is the relevant paragraph ... Origins, supported by the Department of Education and Science, is specifically for people who spent part of their childhood in residential institutions. The Origins Service consists of a team of Information Counsellors and Administrative staff based in Dublin, Cork, Galway and Wexford and a Service Manager.
Best Wishes, Chris