OBYC - Account Posting - Rules

Dear all,

I created a "Z" Transaction Key which i shall be using in an account determination , but as per standard rule account determination is only based on

Genral Modicfication

Valuation modification

and

Valuation class

if i want to determine an account based on plant number or profit center number for those i can define individual G/L account how can i do that?

Deepak