Merlin Component lifestyle per user

All,

Let me briefly explain my requirement. 

    My System should be able to provide an instance of
a component per user. That means there will be one and
only instance of a component created during the user's
first request and the system will be serving the same
instance to the user's all of the following requests.
Also system should be able to reconfigure any or all
of the instances of that component.


Could any one of you help me to find out a way for
implementing this using Merlin.

Note: I was looking at the "lifestyle=transient", but
"transient" will return a new instance for every
request, where as I need the same instance of the
component for all of the user's requests. 

regards,
Subbu


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