please check here to work with connected webpart
http://www.dotnetcurry.com/ShowArticle.aspx?ID=678
if i understood correctly once you filter the data then you need to insert the filter details to the list .
once you have data in consumer webpart you work with that to store that data into list using object model.
http://sharepointjim.wordpress.com/2010/04/21/programmatically-insert-an-item-in-sharepoint-list-using-asp-net-user-control/
MCTS,MCPD Sharepoint 2010. My Blog-
http://devendra-sharepoint.blogspot.in
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