If/Then statement based on group membership

I'm using a powershell script to automate signature creation from a word template.

Currently the script finds all the ad info, like name, cell phone, address, etc and adds it all to the signature.

I am looking to create some AD groups to add select people to to hide portions of the signature.

For example:  I created a nocellphone group.  I want to create an if/then statement in powershell that will check if the user is a member of "nocellphone".  If they are, hide that portion of the signature, otherwise it will include the cell phone.

Unfortunately I can't just delete the cell phone from AD, as we want this information in the directory, just not going out with all emails.

Any insight on how to do this?

Thanks