Amount need not to post my GL a/c

Hi all

I have a requirement My client wants to not to post some of its condition types amount in a particular GL a/c. The condition types are in pricing procedure and the revenue a/c determination has been done perfectly. since 5 years they are working on the same pricing procedure but now they don't want some of its condition type amount should not post into GL a/c they want it as statistical. Please help me out its very urgent.

Your valuable advice and time is highly appreciable

with regards

santosh