Dunno about Virgin and 2 connections in one house, but mebee 2 yrs ago, Blueyonder said it wouldnt be a problem, cos i enquired when my boy went on Xbox Live ....
I was gonna have 2 x 2Mb, instead of one 4mb, and the girlie i spoke to gave me prices etc ...
Youd have to ask em i spose. ...
If not, get a neighbour to sign up and run the ethernet thru the wall

Nothing is impossible. .. .. .