Particle System Questions / Dataconnection

Hi Everyone,

I want to visualize some sort of Data connection between 2 Actors. A pulsing Beam line is no Problem, but i want either to have one particle bounce between the 2 Actors or a Dotted line which runs form one Actor to the other, and i cannot figure out if its possible to do it purely in a particle system.
Is it possible to spawn every x seconds a 1cm long beam which goes from Source to Target and disappears again ?
If i got it right only beams can have a target ?

Thanks a lot !