Well, not really. ThatÂ´s what movie companies try to do...and anyone here will tell you that it hasnÂ´t worked yet. You can however make it a bit more difficult...somewhere there is a link to software to help with this
1) You should at least include copyright info which should help you if it comes to a court case with a magazine using any of your pictures.
2) Resize your images so that the quality isnÂ´t more than say 1000 x 600 pixels. They will look ok on a monitor or reasonable tv screen, but wonÂ´t be so good for printed media such as magazines.