I believe that if you are doing a ministry w/in the church and your lifestyle is a sin, rather it be homosexual, a drug addict, etc, then you should not be allowed to be in that ministy, the reason is because, as being in a ministry or leadership, then it will send the wrong message to people who are new to Christ... This is not judging them at all, judging is condeming, and this is not an act of condeming... When someone is singing or playing music in a church, it is a ministry, such as preaching, now if that was the case, then it would be the equivalent as a homosexual preaching on the pulpit. Now what kind of example will that be. All of us is born into sinful nature, that is why it's important, that we teach the goodness of Christ so he can give us a new heart, and new desires, and not the desires of this world. That's why the bible says transforming of the mind, because your mindset will not be on desires of homesexuality but desires to please Christ.