SSIS package that imports and updates a table

I have created a package that will insert new rows into destination1 if the AnID does not exist in Source1.  This uses a data flow task which contains a oledb source, lookup and oledb destination. 

Source1Field Name AnID Acol1 Acol2 Destination1 Field Name AnID Acol1 Acol2

I want to be able to update the destination1. Acol1 and destination1. Acol2 if the Source1.Acol1 or Source1.Acol2 have changed.

To do this, would I need to create separate data flow task that includes a source, lookup and destination.  Or is this possible to build into my insert new records data flow task