Hi,
I would suggest to go through our demos and see if there is something resembling your use case:
http://www.lightstreamer.com/demos
I think your case is somewhat similar to what is done here:
http://demos.lightstreamer.com/GridDemo/
The handle on the right commands subscriptions and unsubscriptions
On the other hand, if subscriptions and unsubscriptions have to be commanded by the adapter itself you may look at thius one:
http://demos.lightstreamer.com/PortfolioDemo/
HTH