Destroying particles too far away from the spawner

How do I go about making particles die when they are over a specified distance from either where they started, a specified point, or from the owner/spawner/particle system object position?

Is a script necessary or can I do it through the shuriken systems settings?

I want ‘ambient’ particles around the player, but I don’t want them appearing and disappearing around him while standing still (due to lifetime the particles die and reappear too close making this look too fake), so if he moves forward then the particles behind him will be too far away from the system, die, and spawn particles somewhere else nearer to him.

Even pointing me in the right direction would be helpful.

thanks

I’m still looking for an answer to this. Is anyone able to help?