Timeline markers

Is it possible to hide the markers in the timeline when another action is selected?

ex:
ZombiAction selected -> markers to point where the zombie action starts shown
PlayerAction selected -> markers to point where the player action starts shown

instead of

ZombiAction selected -> markers to point where the zombie&player action starts shown
PlayerAction selected -> markers to point where the player&zombie action starts shown

By the way, I use the game engine