How to "Sort data into various tables and Lookup matching data to populate rest of table"

Hi all, I've hit a Brick wall.. Completely!!

I have a sheet (attached) that I'm inputing all incoming customers into and a few if statements later column N will give me a Quarter and year (conditional formatting giving me a green light) or blank if not eligible.

However, on sheet 2 (Qtr validation) I'd like to automatically populate each quarter i.e. Q1 2012/2013 mini table with all those from the input sheet that had Q1 2012/2013 and so on ... and then pick the corresponding data relating to that customer (Customer Name, Registration Number and SIC Code) . This will allow this sheet to become a quick reference sheet.

I've looked at Vlookup but I have multiple/duplicate values (dates) i.e. so works perfectly but only on the first matching date and I don't no how to work index/match if that is what is needed or work work any other solution...

Many thanks
Chris