Process Model Variables as Record Type data

Hi,

I am trying to make use of record type in my application since we have a requirement to display the data in a list and take action for each row or view each row in a dialog box.

My Business case is like i would receive a json file as input to my process model and i am using a CDT to map the fields of the input json. It consists of various segments and each segment is a list of values which is supposed to be displayed in appian interface to the clerk and take action on each segment rows. Kindly suggest an approach so that i can start building my application. As i read through the record type and its example implementation i predict it will meet my requirement. The only hurdle i am facing is when configuring recordtype source if i use process model all the active instances of the process model are getting mapped as list rather i want to have only the particular instance in current context's PV which is having list of records to be formed as list and as data source.Kindly suggest a way.