1- How i can reset data in the repeating group ,to prevent the same data from display for other users ?
2- i set the " data source" in the repeating group to " do a search for " but in this case every time the user adds new data ,The old data will display too in the repeating group !! how i can make the repeating group display only the data that user add and at the same time not prevent previous or old data from displaying
Try using a custom state as the source of your repeating group. Whenever the user adds something to the list, you update the custom state ( a list value). When the user is ready to submit that data and reset it, you will update the state to a blank value so that the repeating group can be cleared.