A new site lets users create profiles for the different sides of their personality.

Online social networks have allowed people to easily stay in touch with large groups of friends, but the flip side has been well publicized. Some users have struggled over what to do when certain people--such as a boss or an ex-boyfriend--ask to be listed as a friend on their profile.

Adding someone as a friend gives him access to the user's profile, photos, and daily musings. Worries about privacy were renewed recently when Facebook's Beacon advertising initiative began broadcasting information about users' purchasing habits throughout its networks. Now Moli, a recently launched social-networking site, aims to win over concerned users.

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