What I mean is a little different scenario Leonid.
For instance you have one personal timeline post.
Then later you want to share this post to a group or groups too.
In the share menu there is only repost option for this and it reposts to the original container.

What the user need is to have a menu of options to share in, like groups, friends profile, personal profiles, organisation`s profiles.
As you know this is in facebook and people are used to it.
I am just suggesting for the next versions to have this functionality. I guess it is needed.