Without knowing the technology that your using...can't you modify the datasource for each request to only return the records you want to bind against?
So if you're binding to a SQL database currently using this for all requests:
SELECT Id, FirstName,LastName,EmailAddress FROM Contact
Simply modify to this for Request 1
SELECT TOP 10 Id, FirstName,LastName,EmailAddress FROM Contact
Simply modify to this for Request 2
SELECT TOP 10 Id, FirstName,LastName,EmailAddress FROM Contact WHERE Id>10
etc.
If you binding against an XML document referenced by filename, then segregate the different result sets into distinct files.