Hello, in the meantime you can edit the
account_avatar
template:
Find (line 45)
HTML:
<xf:if is="$xf.options.gravatarEnable">
Replace by
HTML:
<xf:if is="$xf.options.gravatarEnable AND $xf.visitor.isMemberOf([X, Y, Z])">
Where X, Y or Z are the usergroup IDs to which you authorize the use of Gravatar.