Yes I have heard of this in quite a few other airports. When intense Lightning strikes are forecast and are within a certain distance from the airfield. Re-fuelling will be suspended and ground services staff will not be asked to work in the open or around aircraft where there is a risk of secondary injury from associated lightning strikes. Also no headset.pushback operations will commence or be undertaken as there is a risk of grounding through the pushback tug or worse case through the headset guys ears...!!!
A number of airports I have operated in, Middle and Far east have this policy, as does a number of UK airports. I have noticed in the UK that some ground staff just carry on but some will run for cover at the first rumble. Any excuse to get in out of the rain.