Please check the below image. I dont know how to achive the below task.
Here i used two Sharepoint List which is "Property Master" and "Unit Master".
Property Master has 1. Property ID, 2. Property Name.
Unit Master has 1.Property ID 2. Property Name, 3. City, 4. Unit Number, 5.Unit Name.
1. If i would select "Property ID" from the lookup field the corresponding "Property Name" will show in the property name textbox.
2. Now, i ll enter some multiple "Unit Mster" details in below repeating table.
3. If i would save now then the corresponding Selected Property ID and Property Name should update in "Unit Master" list with all entered rows in repeating table.
Note: Here i should not use any Form Library. I should achive it with sharepoint list only. By default there is no Repeating table in Sharepoint in Infopath 2010, to bring i need to select "Manage Multiple List Item" opion while create List.