Possible to define custom user display name format?

[SapuSeven]

In my Matrix setup I use many different bridges to combine chats from different platforms.
But I sometimes use different platforms to communicate with a single user and would like to be able to differentiate between platforms by adding a suffix to each chat name.

For example, I have DMs with "Alice (Signal)" and "Alice (WA)" for Signal and WhatsApp conversations.

As far as I can see, mx-puppet-steam does not provide the possibility to define custom username templates,
so "Alice" from Steam will always show up as "Alice" in my DMs instead of e.g. "Alice (Steam)".

Would it be possible to add this feature in the future?