in the new os X operating system, multiple users, regardless of their being administrators or not, simply do not own the program that was installed by another user. Therefore, you have to download limewire separately under each user and then you will be able to use it. This happened to me with numerous other app's i use.

some programs, like office X, the best os X app, recognize separate users rights to programs not in their home folders. un mac like programs, like limewire, obviously do not do this. you should email cust support at limewire.