Nature's Gate 'Light Switch' Lemon Skin Brightener might be good. It does have dimethicone and a few other non-organic ingredients in it:
http://www.natures-gate.com/shop/sho...uctId=48300104
Not sure about the ingredients being completely vegan?:
Certified Organic (*)Pelargonium Graveolens (Rose Geranium) Allplant Essence, Certified Organic (*)Lippia Citriodora (Lemon Verbena) Allplant Essence, Dimethicone, Dimethicone/PEG-10/15 Crosspolymer, Citrus Unshiu (Japanese Mandarin) Peel Extract, Vegetable Glycerin, Butylene Glycol, Certified Organic Citrus Medica Limonum (Lemon) Fruit Extract(2), Certified Organic Rosa Gallica (Apothecary's Rose) Flower(1), Calluna Vulgaris (Heather)(2), Lactuca Scariola Sativa (Lettuce) Leaf(2), Morus ***** (Black Mullberry) Leaf(2), Centaurium Erythraea (Centaury)(2), Clycyrrhiza Glabra (Licorice)(2), Bisabolol Xanthan Gum, Ethylhexyglycerin, Mitracarpus Scaber Extract, Ananas Sativus (Pineapple) Fruit Extract, Arcostaphylos Uva Ursi (Bearberry) Leaf Extract, Saccharum Officinarum (Sugar Cane) Extract, Hinokitiol, Lecithin, Soy Isoflavone Aglycone, Cucurbita Pepo (Pumpkin) Seed Extract, Sclerotium Gum, Sodium Coco PG-Dimonium Chloride Phosphate, Citrus Grandis (Grapefruit) Fruit Extract, Polysorbate 80, Alchohol Denat., Essential Oils of Bergamot, Grapefruit, Orange and Lemon. * Grown in accordance with the California Organic Foods Act of 1990.