Restrictive Uses on HTML Code in Forums

[randominity]

So basically what I want to do is any of the following:



Allow only certain usergroups to use HTML code in posts/threads (provided the forum allows it)
Allow only the first post (i.e. thread starter) to use HTML code


Is there any way to accomplish this without a mod? or will I have to make one >:|

[simsimt]

So basically what I want to do is any of the following:



Allow only certain usergroups to use HTML code in posts/threads (provided the forum allows it)
Allow only the first post (i.e. thread starter) to use HTML code


Is there any way to accomplish this without a mod? or will I have to make one >:|
1. https://vborg.vbsupport.ru/showthread.php?t=96926
2. I no of know way of doing this.