Lomas was last week hit with a six-match touchline ban after being sent to the stand during his side's 1-1 draw at Celtic Park last month, which also sparked a further two-match punishment suspended from earlier in the season after he labelled Ross County midfielder Richard Brittain a cheat.
The former West Ham captain was issued with another SFA notice of complaint on Wednesday after being sent to the stand over his reaction when Nigel Hasselbaink missed a penalty during his team's 1-0 defeat by Hibernian last week.
Lomas has been accused of misconduct by "failing to behave in a responsible manner as an occupant of the technical area by kicking a water bottle carrier causing water bottles to land in the stand".
He has until next Wednesday to respond with a hearing date pencilled in for December 20.
The Saints boss will begin his exile from the dugout at St Mirren Park on Saturday after chairman Steven Brown decided against an appeal, before going to Hampden on Monday in a bid to avoid future penalties.
The length of the punishment, which was imposed by a three-member judicial panel, shocked many within the game and caused confusion about the rules. Partick Thistle manager Jackie McNamara was handed a two-match ban for breaching the same rule as Lomas did at Celtic Park.
Lomas said: "I'm going to have a meeting with Vince Lunny on Monday, with a few managers. I think it's a good thing. It will help to explain the process more than anything.
"That's the confusing thing. Some managers are being done for foul and abusive language and being let off, whereas some like myself are getting six games.
"Hopefully Vince will be able to clarify a few things. I would have thought all the SPL managers will be invited."