public class mainClass
{
    Public List<wclass> allusr {get;set;}
    public List<user> cbo;
}

//onload 
public t2()
    {

//This gives me Logged in users ID and ContactID on his user record
userList  = new List<User>();
    User usr = [Select Id, contactId from User WHERE ID ='XXXyyyyyyyZZZZ' ];
     
//This gives me name of Account of Contact of Logged in User
con = [Select id,Name,AccountId,Account.Name,Phone__c ,Email__c FROM  Contact WHERE ID =: usr.ContactId];
   
//This gives me List of all Contacts for that Account also FIelds on Custom CHild Object of Contact which we need to use for Checkbox Display
contactInfo = [Select id,Name, (SELECT ID ,Active__c,Support__c FROM CustomObject__r)from Contact WHERE AccountId =: con.accountId];
    
//This gives List of Users for those Contacts       
userinfolist = [Select Id,Name,ContactId,Contact.Name,Email,CompanyName,Phone, Active__c, Support__c from User Where IsActive = true AND Profile.Name =: Label.SupportUser AND ContactId IN: contactInfo];
    


        usr = new List<user>();
        cc = new List<wclass>();
        for(user varName :userinfolist )
        {
            if(varName.Active__c == true && varName.Support__c == true)
{
                 allusr.add(new wclass(varName, true));
              }
              else
               {
                allusr.add(new wclass(varName, false));
               }
        }
    }

//Wrapper Class
public class wclass
    {
        public user  infoList{get; set;}
        public Boolean selected{get; set;}
       
 public wclass(user  uil, Boolean b)
        {
            infoList=uil;
            selected = b;
        }
    }



-------------------vf page------------------

//use User's "allusr list" in the vf page instead of userInfoList