You will find that there are at least small traces of salt in just about everything that you eat, including pork. Pork is one of the many naturally salty foods.
Some of the other foods that are naturally salty include canned tuna, olives, dill pickles, capers, brined meats, and canned tomatoes. Pork is also naturally low in sodium, making it a good type of meat to include in your diet on a semi-regular basis.
Because pork has quite a bit of fat on it, you will need to make sure that you cut it off before cooking and eating it.