Migrating users that are already in group in Target Domain

We are performing an intra-forest migration.  We have several groups in the target domain.  Let's call the target domain - target.local.  These groups in target.logal have, as their members, users in the source domain.  Let's call the source domain - source.local.  Once the users are migrated from source.local to target.local - Is there a way to process the groups in target.local where all the migrated users from source.local are added to the groups with there target.local accounts.  This, of course, would have to be performed before the migrated users are deleted from target.local.