Altering property dynamically in Currency Conversion activity

I’m trying to convert the values in an excel file from one currency to another, using Currency Conversion activity. The activity has a property to select the currency before executing the workflow, but it is static thru out runtime. Is there any possibilities to change it dynamically during the runtime.
For instance, the 1st row is to convert values from CAD to INR and the 2nd row, from USD to CAD.