Common Neutral for Dimmer Extension

[SFisher]

Hello,
has anyone chance to solve this issue:
- the cable 4x (2 x phases, 1 x neutral, 1 x earth)
- 2 rooms
- Loxone Dimmer Extension

By rules every dimmer should have own neutral.
It's a pity I have existing cable 4x for 2 rooms. So there is the common neutral for both...

I need to install in one of 2 rooms - dimmer light



Is there any method how it's possibly to solve this issue?

Thanks