In Golaem Crowd, the current time of a simulation is specified in the Crowd Manager Node. By default, the current time attribute is connected to the main scene time node (time1) but it can be altered easily by using Maya's Time Warp feature or creating your own keyframe animation. This can be used to reproduce a slow motion effect or a fast forward effect.
When warping time, it's important to make sure that time NEVER goes backward
That's the easiest way, just follow Maya's tutorial on this topic and the corresponding warping will be applied to your simulation.
If, for some reason, you're not able to use Maya Time Warp, you can also control the simulation time with a custom keyframe animation:
connectAttr -f crowdManagerShape.currentTime myParticleShapeName.currentTime;