Suppose A lied to B and then B asks in order to make sure if it is true or not
Is it true that you lied to me?
Is it true that you had lied to me?
Suppose A lied to B and then B asks in order to make sure if it is true or not
Is it true that you lied to me?
Is it true that you had lied to me?
Yes, you can use Past Perfect (had lied) to speak about a time earlier than before now but this tense is mostly used to make it clear that one event happened before another in the past. But in a simple question that speaks about the past it is better to use the Past Simple (lied).
Depending on what context you have you choose which tense to use.