To make the sweet chili dipping sauce: In a saucepan over medium heat, add the water, rice vinegar, ketchup, sugar, chili sauce or sambal oelek, and garlic. Bring to a simmer. Mix the cornstarch with 3 tablespoons water to make a slurry. Stir it into the sauce and cook until thickened. Set aside.
To make the filling: In a large mixing bowl, add the ground pork, carrot, onion, garlic, scallions, salt, black pepper, soy sauce, and 1 egg. Mix thoroughly until evenly combined.
To prepare the piping bag: Place a piping bag or sturdy zip-top bag inside a tall glass. Transfer the pork filling into the bag, close the top, and cut off the tip.
To assemble the Filipino Fried Spring Rolls (Lumpia): Beat the remaining egg in a small bowl and set it aside for sealing. Place one wrapper on a flat surface in a diamond shape and pipe a thin horizontal line of filling across it. Fold the bottom corner up over the filling, fold the left and right corners inward, then roll tightly toward the top. Brush the top edge with beaten egg and finish rolling to seal. Repeat with the remaining wrappers and filling.
To fry the Filipino Fried Spring Rolls (Lumpia): Heat the cooking oil to 325°F (163°C). Working in batches, fry a few spring rolls at a time for about 5 minutes, turning as needed, until golden and crispy and the pork filling is completely cooked through. Transfer to a paper towel-lined plate to drain. The pork filling should reach at least 160°F (71°C).
To serve: Serve the Filipino Fried Spring Rolls (Lumpia) hot and crispy with the homemade sweet chili dipping sauce.