how to block emule port

["Jocool" <supraxd@xxxxxxxxx>]

dear all

any1 know how to block
port for emule on freebsd?

i havebeen tried to block emule
port default but user still can use 
another port.

any1 knows rule how to make 
bandwith limiter?

pls need your suggestion
thank's & regards
Joce