Question

We are having multisite clearcase environment.

Within a site we are having multiple streams.

Is it possible to transfer an activity from one stream to another [wtihin same replica]?

Answer 1

Multi-site or not, an activity is linked to a stream (you cannot “move” an activity from one stream to another)

See “About activities“:

The activity object belongs to a single stream and cannot be moved to another stream.
(If you assign one or more versions to the wrong activity or if you create new activities to better represent your work, you can assign the versions to a different activity.)

Multi-site allows for ownership (called “mastership”, see “About deliveries in a Rational ClearCase MultiSite project“) transfer between sites, but it is still attached to the same stream.