Show the list of documents while selecting Organisation name

Question

I am beginner at Sharepoint. I need some help. I have two lists. First list is incoming documents list(InDocs). The columns are 'Document name', 'Where from'. Second list is outgoing document list(OutDocs). The columns are 'Document name', 'Where to'. 'Where to', 'Where from' columns are the names of Organisations. Now I need another list which shows the unique names of organisations which are used in InDocs and OutDocs lists. When I select any organisation, it must show me the list of documents where the 'Where from' and 'Where to' cell values are equal to the selected name of organisation. I use only browser, no sp designer, no VS.