We still have problems in understanding the question.
A "schema" is a list of fields to be subscribed to by the client, hence it's not clear what you mean by "create instant of Schema1".
By each "launcher" are you referring to a distinct Remote Server instance?
Then no, a single Data Adapter (hence, a single Remote Server) must be used to supply all the items that a single client requires. A single Data Adapter can handle subscriptions for multiple items and feed each item with the proper fields.
Your Data Adapter should be able to distinguish different kinds of items based on their name and supply field values accordingly. Upon subscribe("CodeItem1") it should supply Code=ABD Ref=10 Ce=12 Fl=8 and upon subscribe("ItemIndex1") it should supply Session=1 Index=1006 IndexChange=6