Hi Pradeep,
If I get the idea, first you read the information for .txt file and the you try to create a users from this file into the IdM IS.
1. First you have to read the information and store it into a new table(HR_TABLE)
2. Then in your second pass, into the source tab you have to make a select that will read from this table(HR_TABLE)
3. Finally into the destination tab(of your second pass) you have to get the values from the HR_TABLE
BR,
Simona