Maybe we are the away team because we (cough!) finished below them in the table? This would be in line with the principle that that in the semi finals the highest placed team is given the slight advantage by playing their home game last.
Is this what you mean? There is nothing in this article to suggest that you would be able do it at home for yourself.
Here is one already on the market.
It has just been announced on Radio Oxford that the Club are going to ask for season ticket holders to be allowed to attend the play off final at Wembley. I can't see it happening but if you don't ask, you don't get.