Yes, supported

Mod is replace 2 variables: $template_hook[postbit_userinfo_left] (as starting tag collapse) and $template_hook[postbit_userinfo_right] (as ending tag collapse). So if you have not default style, put first variable under condition about avatar and second variable under $post[icqicon] $post[aimicon] and etc.
Soon i'm rebuild mod for postbit (not legacy) mode.