Is this the pine tar soap you're referring to?:
I've used pine tar soap, and I love the smell, but I found it too drying for regular use. You mentioned using it on your hair: how do you find it affects your hair? My own beard is pretty close-cropped, and I've never used any special 'beard treatment' on it. I avoid using most shampoos on my beard: some of them seem to make my skin break out, even though I use them on my scalp without any problems. I'd think pine tar soap would be OK on your facial skin, as long as you're using some type of moisturizer, especially in winter. My concern would be that it may be too drying on your beard, but I think that would depend on the length of your beard.