Need a mod for the Xenforo forum

The services of a web programmer are required. It requires a mod for the Xenforo forum.
Forum: Xenforo 1.5.15
Mod (event modification according to my criteria described below) for Brivium Credits Premium 2.0.14 is required. Namely:
In the “factory” function when assigning events “Creating personal correspondence”, “Receiving personal correspondence”, “Responding to a private message” and “receiving a response to a personal message” is the binding of these events to a particular group of users.
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It is necessary that: the listed four events have a setting not only WHO is committing this event, but also in relation to WHO this event is being performed (that is, you need to add a second list of groups to the event settings for a more detailed purpose of the event).

Example: The user receives a response to a private message. In the stock (factory version) it does not matter who wrote it - the event works the same for all groups. And it is necessary that when receiving a personal message from the user of group A, the addressee earns one amount of virtual currency, and from the user of group B - another amount (and even, perhaps, in another virtual currency). And, as a consequence of the above, when sending a message to a user of group A, one amount of virtual currency was withdrawn from the user's account, and when sending a message to a user of group B, another (and possibly in another virtual currency).