You can't.
What do you mean by voice bind ? If you mean "+voicerecord" try this:
PHP Code:
new bool:voice_blocked[33];
public plugin_init() {
register_forward(FM_Voice_SetClientListening, "FwdSetVoice");
}
public FwdSetVoice(receiver, sender, listen) {
if( voice_blocked[id] ) {
engfunc(EngFunc_SetClientListening, receiver, sender, 0);
return FMRES_SUPERCEDE;
}
return FMRES_IGNORED
}