[BirdOPrey5]

Edit your postbit (and postbit_legacy) templates...

Put the entire code inside this conditional:

<if condition="!$show[guest]">


*all original code here*

</if>

That will show nothing to anyone who is a guest.

If you want to show something in place of nothing try:

<if condition="!$show[guest]">


*all original code here*

<else />

Guests cannot see this data.

</if>

That said, you should probably just use forum permissions to make guests not be able to view any threads rather than doing this template edit.