you can achieve it by using post execution code and form data initialization code in assign user task operator.
for example a table1 with Cost and Data fields in IRF
in post execution code write:
Process.table1 = Process[OpName].table1;
Process.Cost= Process[OpName].table1.Cost;
Process.Data= Process[OpName].table1.Data;
now in form data initialization code for other IRF type:
Form.table1 = Process.table1;
Form.table1.zData = Process.Data;
Form.table1.zCost = Process.Cost;