Is it aganst gods law to look at naked woman on the internet?:
No. God never specified that looking at a naked woman was against his laws. However, in Matthew, Jesus states (in relation to adultery) that if you lust after a woman in your thoughts, then you are just as guilty as if you have sex with her. You can lust after a woman with her clothes on or off, but any male (that's honest) will tell you that it is much easier to lust over a naked woman than a clothed woman.

So no, it's not against God's law, but it's not a very good idea. Like taking an alcoholic to a bar, it's just better to stay away from that kind of temptation.