Now handled under the following repo https://github.com/Er1807/CVR-Mods
Create local Freeze Frames of Avatars in VRC
Requires VRChatUtilityKit and ActionMenuApi
The actionmenu can be used to create a frezze of everyone in the lobby or only yourself, and all can be eleted again
To only create a frezze of a remoter avatar a button in the context menu can be used
Result
As an optional dependency VRCWS can be used to synchronize freezes creation between everyone with these two mods. This requires that you are in the same world and have the other person trusted. For more details on this process look at the VRCWS repo.