Yes, and you have several options for hearing protection configuration. While I have never used an LTP, I've used the TW exfil ballistic before, which seems to be the same profile as the LTP. Plenty of space for ear pro.
You can run standard ear pro under helmets by making a "channel" or space for the headband in the pads, and wearing the headband style underneath the helmet. This is not the preferred option, and not the most comfortable, but it can work in a pinch. I wouldn't want to use this option if possible, especially for long periods of time.
Another option is using the ear pro/headset adaptor mounts that attach to the helmet rails and suspend the ear pro over each ear. I've used helmets with this option, and it is very nice in regards to comfort and stability. Peltor mounts are common, Howard Leights can be modded for this option; it has been done before. I like this option if the ear pro is going to stay with the one helmet all the time - it is not really one where you can constantly be moving the ear pro from helmet to helmet or using the ear pro alone without the helmet.
My current setup is a set of neckband MSA sordins, which I wear underneath the helmet, without having the headband interference of standard ear pro. The MSA neckband muffs give me the option to use the ear pro alone, under my ballistic helmet, and under my bump helmet with ease. Several companies make neckband electronic ear pro.